Position your oven rack to the middle and pre-heat to 375 F.
Back at your stove, heat a large pan to medium and add olive oil.
Add ground turkey. Use a spatula to crumble the turkey until it's browned with minimal pink remaining. Stir occasionally as needed.
Add zucchini, onion, salt, pepper, and chili powder. Cook for 4-5 minutes, stirring occasionally, until onions are translucent and softened.
Add garlic and stir. Cook for 1-2 minutes or until just fragrant, stirring frequently to prevent burning. Turn off the heat.
Add chilies, beans, corn, enchilada sauce, lime juice (if using), and tortillas. Stir. If your pan isn't big enough for all the ingredients, combine in a large bowl instead. Then, pour the mixture into your 9x13-inch baking dish and gently flatten with a spatula. Top with cheese.
Transfer to the oven and bake for 25-35 minutes or until cheese is bubbling. If desired, finish for 2-3 minutes under the broiler for extra browning, but watch it carefully to prevent burning. Let it rest for 10-minutes before serving.
Nutrition facts calculated without toppings.
Calories: 379kcal, Carbohydrates: 37g, Protein: 31g, Fat: 14g, Saturated Fat: 6g, Polyunsaturated Fat: 2g, Monounsaturated Fat: 5g, Trans Fat: 0.01g, Cholesterol: 68mg, Sodium: 1243mg, Potassium: 668mg, Fiber: 6g, Sugar: 11g, Vitamin A: 1378IU, Vitamin C: 19mg, Calcium: 232mg, Iron: 2mg