Heat olive oil in a large skillet over medium heat. Add the onion and garlic, sautéing until soft and fragrant, about 2-3 minutes.
Add the ground turkey (or beef) to the skillet. Cook, breaking it up with a spoon, until browned and cooked through.
Stir in the taco seasoning, along with a little water if needed, following the packet's instructions (or your homemade mix). Add the reserved tomato pulp here if you like.
Mix in the black beans and corn, and cook for another few minutes until everything is heated through.