Healthy Taco Casserole

Name: Healthy Taco Casserole
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: Mexican
Ingredients: 2 tbsp olive oil, divided; 1 large sweet potato, diced; 1 lb ground turkey or chicken ((can also use ground beef)); 1 yellow onion, diced; 2 cloves garlic minced; 1 tbsp chili powder; 1 tsp cumin; 1 tsp paprika; 1 each red, green and yellow pepper, diced; 1 cup cheddar cheese, grated; 2 beefsteak tomatoes, diced; 2 green onions, sliced; 1/4 cup cilantro, chopped; Tortilla chips for serving (optional)