Preheat oven to 425°F. Place the green pepper halves in an oven-safe baking dish and bake until the peppers soften, about 15 minutes.
Heat the olive oil in a skillet over medium high heat. Add the ground beef and cook until browned, about 5-7 minutes. Drain any fat.
Add the chili powder, cumin, dried oregano, garlic powder, salt, pepper, tomato paste and water. Stir to combine and continue cooking over medium-low heat until the sauce has thickened, about 3-5 minutes.
Spoon the taco meat into the crevice of the four baked pepper halves and sprinkle the cheddar cheese on top. Return peppers to the oven until the cheese melts, about 5 minutes.
Top with lettuce and salsa or any other taco toppings
Video
Notes
Storage: Store any leftovers in an airtight container. They will last about 3-4 days in the fridge.Make Ahead: You can make the taco meat ahead of time and freeze for up to 3 months. When ready to use it in the recipe, thaw in the fridge overnight or for at least 6-8 hours.Substitutes: For best results, follow the recipe as is but feel free to improvise on the seasoning and the taco toppings.