I had huevos rancheros for breakfast today.
Authentic Mexican quesedillas are easy. Fry corn tortillas in a little oil in a skillet and flip them over. Slice or grate any kind of cheese and lay on top of the tortillas and fold over in half. Serve hot and melty. That is the way that they serve then on the street carts in west Mexico. You can add just about anything to them; jalapenos, salsa, cooked crumbled hamburger or ground pork, ham slices, shredded pork or chicken, shrimp, bacon, or whatever. I like shredded chicken and avocado slices myself, with some pico de gallo salsa.
Simple pico de gallo salsa:: coarsely chopped up: tomatoes, onions, and ripe red, orange or yellow pepper (or green if you like New Orleans style), and add some minced: cilanthro, garlic, a serrano or small jalapeno pepper, and salt and pepper. You can also add a chopped up tomatillo. You can also add a minced habanero if you like it REALLY SCREAMING HOT! Warning: it will burn TWICE!