Directions:

1. Slice each bolillo roll in half, lengthwise.
2. Spray each half with cooking spray and lightly toast on a frying pan.
3. In the meantime, heat the refried beans over low heat.
4. When toasted, spread each slice with refried beans and top with shredded cheese.
5. Place on a baking sheet and broil until the cheese melts, about 2 minutes.
6. Serve immediately.
7. Top with chorizo, pico de gallo, salsa. If desired.