Heat the oil in a large skillet set over medium heat. Add the onion and cook until it becomes translucent, about 5 minutes.
1 tablespoon olive oil, ½ onion
Add the turkey and cook until browned through, about 8 minutes.
1 pound ground turkey
Stir in the garlic, cumin, chili powder, onion powder, garlic powder, and salt. Cook for another 30 seconds.
3 cloves garlic, 1 teaspoon cumin powder, 1 teaspoon chili powder, 1 teaspoon onion powder, 1 teaspoon garlic powder, ½ teaspoon kosher salt
Add the beans, corn, and tomatoes. Stir well and cook for 5 minutes.
15 ounces black beans, 15 ounces golden sweet corn, 14.5 ounces petite diced tomatoes
Fill each lettuce leaf with the turkey filling, add your favorite toppings, and serve.
1 head butter lettuce, Shredded Colby jack cheese, cilantro, and sour cream