01 - Preheat oven to 375°F. Line a baking sheet with parchment paper.
02 - In a bowl, mix eggs, cheddar, mozzarella, paprika, salt, and pepper. Spoon into 4 even rounds on the prepared baking sheet.
03 - Bake for 8-10 minutes, or until edges are golden. Remove and let cool for 2 minutes, then shape over a rolling pin to form taco shells. Allow to cool completely.
04 - Heat olive oil in a skillet over medium heat. Add onion and garlic, sauté 2-3 minutes until fragrant.
05 - Add ground beef, breaking up with a spatula. Cook until browned, about 6-8 minutes.
06 - Stir in cumin, smoked paprika, chili powder, oregano, salt, and pepper. Add tomato paste and water, mixing well. Simmer for 3-4 minutes until thickened.
07 - Fill each cooled shell with the beef mixture. Top with avocado slices, sour cream, lettuce, tomatoes, cilantro, and a squeeze of lime.