Toasted bolillo halves topped with refried beans and melted cheese are Mexico's breakfast open-face sandwich. This vegetarian, high protein dish is a fresh, family-friendly, healthy morning option.
Preheat oven to 425°F and line a baking sheet with parchment paper.
Slice bolillo rolls in half lengthwise, brush cut sides lightly with olive oil, and place cut-side up on the prepared baking sheet.
Toast the rolls in the oven for 5–7 minutes until edges are crisp but centers still soft.
Spread a generous layer of refried beans evenly on each toasted roll half, then sprinkle with shredded Monterey Jack cheese.
Return to oven and bake until cheese is fully melted and bubbling, about 6–8 minutes; for deeper browning, broil for 1–2 additional minutes watching closely.
While molletes bake, dice tomato and chop cilantro to prepare topping.
Remove from oven, top with tomato, cilantro, and a sprinkle of salt and pepper; serve immediately with a wedge of lime for squeezing.