Method

1. Preheat oven to 375º. Line a baking sheet with parchment paper and spray with cooking spray. Place 1/2 cup mounds of cheddar on baking sheet and season with pepper.
2. Bake until cheese is melty and slightly crispy, 5 to 7 minutes. Blot grease with a paper towel.
3. Meanwhile, set up 4 stations of two upside-down glasses and a wooden spoon as a bridge. Using a spatula, immediately transfer cheese mounds to wooden spoons to form shells. Let cool.
4. Meanwhile, make taco meat: In a large skillet over medium heat, heat oil.
5. Add onions and cook until soft, 5 minutes, then add ground beef and cook until no longer pink, 6 minutes more. Drain fat and season with taco seasoning.
6. Assemble tacos: Place beef in shells and top with lettuce, tomatoes, and hot sauce.