In a skillet over medium heat, add olive oil. Cook the diced protein until browned and fully cooked.
Sprinkle the taco seasoning over the cooked protein, stirring to coat evenly. Cook for an additional 2-3 minutes. Remove from heat.
In separate bowls, set up the sliced bell peppers, shredded lettuce, halved cherry tomatoes, shredded cheddar cheese, and guacamole.
Heat the tortillas on a griddle or in the oven until warm and pliable.
Lay out the warm tortillas. Spoon the creamy protein onto each tortilla.
Top with bell peppers, lettuce, cherry tomatoes, and a generous sprinkle of shredded cheddar cheese.
Drizzle each taco with sour cream and sprinkle fresh cilantro on top.
Serve immediately, allowing guests to add additional guacamole or cheese as desired.