Heat a frying pan over medium-high heat.
Slice the telera or bolillo rolls in half lengthwise.
Cut all the filling vegetables while the pan heats.
Grease the hot pan with a bit of oil.
Season beef fajitas with salt and pepper.
Cook beef fajitas in the pan for 5-7 minutes per side.
Slice sausage in half lengthwise and cook until golden.
Cook ham slices in the pan until golden brown.
Heat refried beans with jalapeños in the pan.
Spread shredded cheese over the hot beans.
Toast the sandwich bread lightly in the oven or pan.
Spread beans, jalapeños, and cheese on the bread.
Layer with beef fajitas, sausage, and ham.
Add avocado, tomato slices, lettuce, and onion on top.
You can skip or add extra vegetables or cheese if desired.
Your delicious sandwich is now ready to serve.