Slice the chicken breasts horizontally to create 4 thin cutlets.
Season both sides with paprika, garlic powder, salt, and black pepper.
Set up three shallow bowls: one with flour, one with beaten eggs, and one with breadcrumbs.
Coat each chicken cutlet in flour, dip into the eggs, then press into the breadcrumbs until evenly coated.
Heat about 1 inch of vegetable oil in a large skillet over medium heat.
Fry the chicken for 4–5 minutes per side, or until golden brown and cooked through (internal temperature of 165°F/74°C).
Transfer to a paper towel-lined plate to drain excess oil.
In a small bowl, mix mayonnaise, lime juice, hot sauce (or chipotle), and minced garlic until smooth.
Slice the bolillo rolls and toast them lightly until golden.
Spread the chipotle-lime mayo on both halves of each roll.
Layer each sandwich with crispy chicken, cheese, avocado, lettuce, tomato, red onion, and pickled jalapeños.
Close the sandwiches and serve immediately while warm.