1. Heat the olive oil in a large skillet over medium heat. Add the chopped onion and bell pepper, cooking until they start to soften, about 5 minutes.
2. Add the ground beef to the skillet, breaking it up with a spatula. Cook until browned, about 8-10 minutes.
3. Stir in the garlic powder, ground cumin, smoked paprika, chili powder, salt, and pepper. Mix well and let the spices infuse the beef for another 3-4 minutes.
4. Lay the slices of cheddar cheese over the beef mixture. Allow the cheese to melt into the meat, about 2-3 minutes. Stir to combine, ensuring the cheese is evenly distributed.
5. While the cheese is melting, toast the sandwich rolls lightly to give them a slight crunch.
6. In a small bowl, mix the mayonnaise with the hot sauce (if using) to create a spicy mayo spread.
7. Assemble the sandwiches by spreading the spicy mayo on each roll. Add the chopped cheese mixture, followed by shredded lettuce and sliced tomatoes.
8. Serve immediately while everything is warm and melty. Enjoy the delicious fusion of Mexican flavors in every bite!

One of my favorite things about this recipe is how adaptable it is. I often encourage experimentation in the kitchen, much like my family did when we tried new ingredients in traditional dishes.