All amounts are approximate. Adjust to your tastes.
4-5 corn tortillas, cut into wedges
2 Tbs of butter, maybe a bit of vegetable oil
2 Tbs of finely diced onion, or more if you like
2 lg peeled and diced tomato (or a cup scoop of canned, diced tomato). Add more if you like.
3 eggs or so, beaten
salt and pepper
meat or beans of choice (optional)
garnish of choice (chives, cilantro, whatever you like)
Saute tortillas in butter/vegetable oil until mostly crisp. Add onion and saute a bit to soften. Add tomatoes and simmer 1-2 minutes. Add eggs. Season with salt and pepper. Scramble slowly until eggs are finished to your liking. (I like mine a bit wet.) You can add cheese, if you like. Garnish with chopped chives, or chopped cilantro.
I often add diced bacon. I chop the bacon before cooking and fry it up in a separate pan to minimize the bacon fat in the final dish. I don't like my bacon fat to overpower the flavors of the tomato and tortillas. Or sometimes I add black beans or chorizo.
*You see, with huevos motuleños there's the fried eggs, and the fried tortillas, and the sauce, and the beans, and ham and peas... And I make two-layer motulenos, so there's food stacking involved. Well, as you can see, it's a bit of work and my stovetop is a mess when I'm done. But they sure are delicious. I'll have to post them sometime.