This high-protein Southwest Turkey Casserole is perfect for meal prep. Packed with ground turkey, black beans, and corn, it's a macro-friendly dinner the whole family will love.

Ingredients

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Instructions

Step 1

Preheat your oven to 375°F (190°C). While the oven heats, set a large oven-safe skillet or a separate large skillet over medium-high heat. Add 1 tablespoon of olive oil and let it shimmer, about 30 seconds. The oil should be hot enough that a drop of water sizzles on contact. This ensures proper browning of the turkey rather than steaming. Add the ground turkey to the skillet, breaking it apart with a wooden spoon or spatula. Cook for 5-7 minutes, stirring occasionally, until the turkey is no longer pink and has developed some golden brown bits on the edges. This browning, known as the Maillard reaction, adds deep savory flavor. If you notice excess liquid pooling, continue cooking until it evaporates. Once cooked, transfer the turkey to a plate using a slotted spoon, leaving any rendered fat in the pan for the vegetables.

Step 1 image
Step 2

In the same skillet over medium heat, add the diced onion and red bell pepper. Cook for 3-4 minutes, stirring frequently, until the onions become translucent and the peppers soften. The aroma should be sweet and slightly pungent. Add the minced garlic and cook for another 30 seconds until fragrant, but be careful not to burn the garlic as it turns bitter. If the pan seems dry, add a splash of water or a little more oil. The moisture from the vegetables will help deglaze the pan, lifting any browned bits from the turkey – those bits are packed with flavor. Now add the drained black beans, frozen corn, and the can of diced tomatoes with green chilies (including the liquid). Stir everything together, scraping the bottom of the pan to incorporate any fond.

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Step 3

Return the cooked ground turkey to the skillet. Sprinkle in the southwestern seasoning, ground cumin, smoked paprika, and a generous pinch of salt and black pepper. Stir well to combine all ingredients. Let the mixture simmer for 3-5 minutes, allowing the flavors to meld and the liquid to reduce slightly. You want a thick, chunky mixture that isn’t soupy. Taste and adjust seasoning – add more salt or cumin if needed. At this point, if you’re not using an oven-safe skillet, transfer the mixture to a greased 9×13-inch baking dish. Spread it into an even layer.

Step 4

Sprinkle the shredded Mexican blend cheese evenly over the top of the casserole. For a more even melt and a golden crust, you can also add a light dusting of smoked paprika or chili powder on the cheese. Place the skillet or baking dish in the preheated oven and bake for 15-20 minutes, until the cheese is fully melted, bubbly, and starting to turn golden brown at the edges. If you prefer a deeper golden crust, switch the oven to broil for the last 1-2 minutes, watching closely to prevent burning. The casserole should be hot throughout, with the internal temperature reaching at least 165°F (74°C). Remove from the oven and let it rest for 5 minutes before serving. This resting period allows the casserole to set, making it easier to portion. Garnish with fresh cilantro if desired.

For best results

  • For the best texture and flavor, avoid overworking the ground turkey while browning. Let it sear undisturbed for a minute before breaking it apart. This creates larger, juicier crumbles rather than a fine, dry mince. Also, using 93/7 lean turkey strikes the perfect balance between moisture and fat content; extra lean (99/1) can result in a dry casserole, while higher fat may make it greasy. If you only have extra lean, add a tablespoon of olive oil to compensate.
  • To prevent your casserole from becoming watery, make sure to drain and rinse the black beans thoroughly. The liquid from canned beans (aquafaba) can thin out the casserole and dilute the seasoning. Similarly, if using frozen corn, there's no need to thaw it first; adding it frozen helps regulate the temperature and prevents overcooking. However, if you notice excess moisture after baking, you can drain the corn in a colander before adding.
  • This casserole is a meal prep champion. To store, let it cool completely, then divide into airtight containers. It will keep in the refrigerator for up to 4 days. For longer storage, freeze individual portions for up to 3 months. To reheat, microwave on high for 2-3 minutes, or reheat in a 350°F oven for 15-20 minutes. If frozen, thaw overnight in the fridge before reheating. The flavors often deepen after a day, making leftovers even tastier.
  • Feel free to customize the southwestern seasoning blend. A typical mix includes chili powder, cumin, garlic powder, onion powder, oregano, and a pinch of cayenne. You can also use a store-bought taco seasoning, but watch the salt content. Making your own allows you to control the heat and sodium. For a smoky twist, add an extra 1/2 teaspoon of chipotle powder or adobo sauce from canned chipotles.
  • For a dairy-free or lower-calorie version, omit the cheese or use a dairy-free alternative. Nutritional yeast can be sprinkled on top for a cheesy flavor without the dairy. If you want to add a crunchy topping, mix crushed tortilla chips with a little oil and sprinkle over the cheese before baking. This adds a satisfying texture contrast.
  • To save time, you can prep the vegetables and measure the spices the night before. The entire casserole can also be assembled (without baking) up to 24 hours in advance. Simply cover and refrigerate, then bake when ready. You may need to add 5-10 minutes to the baking time if starting from cold.

Variations

  • **Chicken Southwest Casserole:** Substitute the ground turkey with an equal amount of shredded cooked chicken (rotisserie chicken works great). Simply skip the browning step and stir the chicken in with the vegetables and beans. This variation is even quicker and has a different texture. You can also use ground chicken or ground pork if preferred.
  • **Vegetarian Black Bean & Quinoa Casserole:** For a meatless version, replace the turkey with 1 cup of cooked quinoa and an additional can of black beans. The quinoa adds protein and a pleasant chewiness. You may want to add a bit more seasoning to compensate for the lack of meat. Consider adding 1 cup of sautéed mushrooms for umami depth.
  • **Low-Carb / Keto Adaptation:** Omit the black beans and corn (or replace with 1 cup of cauliflower rice and 1/2 cup of diced zucchini). Use full-fat cheese and add 1/2 cup of sour cream or cream cheese to the mixture for richness. This version is lower in carbs but still high in protein and fat, making it keto-friendly.
  • **Spicy Chipotle Version:** Add 1-2 chopped chipotle peppers in adobo sauce along with the tomatoes. This gives the casserole a smoky, spicy kick. You can also stir in 1/4 cup of chopped pickled jalapeños for extra heat and acidity. Adjust the amount to your tolerance.
  • **Loaded Southwest Casserole:** Top the casserole with sliced black olives, diced avocado, a dollop of Greek yogurt or sour cream, and fresh salsa after baking. This adds freshness and a variety of textures. You can also mix in 1/2 cup of cooked brown rice or farro for added fiber and chewiness.

Nutrition

  • Calories385 kcal
  • Total Fat14g
  • Saturated Fat6g
  • Cholesterol85mg
  • Sodium720mg
  • Total Carbohydrates30g
  • Dietary Fiber8g
  • Sugars6g
  • Protein35g

Common Questions

Can I use ground beef instead of ground turkey?
Absolutely! Ground beef (90/10 or 85/15) works wonderfully in this casserole. The flavor will be richer and more robust. Just be sure to drain any excess fat after browning to avoid a greasy casserole. You can also use ground chicken or pork for variety.
How can I make this casserole dairy-free?
To make it dairy-free, simply omit the cheese or use a dairy-free shredded cheese alternative. Many brands now melt well and have a similar texture. Alternatively, you can top the casserole with a mixture of nutritional yeast (2 tablespoons), almond flour, and a pinch of salt for a cheesy flavor without dairy.
Can I freeze this casserole?
Yes, this casserole freezes beautifully. Assemble the casserole completely but do not bake. Wrap the dish tightly with plastic wrap and then aluminum foil, or transfer to a freezer-safe container. Freeze for up to 3 months. To bake, thaw overnight in the refrigerator, then bake as directed, adding 10-15 minutes to the cooking time. You can also bake from frozen at 350°F for about 45-50 minutes, until hot and bubbly.
What can I serve with this casserole?
This casserole is a complete meal on its own, but you can serve it with a side of cauliflower rice, a simple green salad with lime vinaigrette, or tortilla chips for scooping. For a low-carb option, try steamed broccoli or roasted zucchini. A dollop of Greek yogurt or avocado slices adds creaminess.
How do I prevent the casserole from being dry?
The key to a moist casserole is not overcooking the turkey and ensuring enough liquid from the tomatoes. If you find the mixture too dry before baking, add 1/4 cup of chicken broth or water. Also, covering the casserole with foil for the first half of baking can trap steam. However, this recipe is designed to be moist with the beans and tomatoes.
Can I add more vegetables?
Definitely! Feel free to add diced zucchini, yellow squash, or chopped spinach. Sauté them along with the onions and peppers. If adding spinach, stir it in at the end just until wilted. You can also add roasted bell peppers or corn off the cob for extra sweetness.
Is this recipe gluten-free?
Yes, this recipe is naturally gluten-free as long as you use a gluten-free southwestern seasoning blend. Check the labels on your canned tomatoes and beans to ensure no gluten-containing additives. Serve with gluten-free sides if desired.