This is one of those recipes for which Mark doesn't give specific amounts. You just "intuit" it. I haven't tried this but am posting it here for safekeeping. Cooking and prep times are estimates (very wild guesses, actually).
Saute about a pound of sliced sirloin steak in some olive oil over high heat til seared but still rare.
Remove meat; add more oil if necessary; add sliced red bell pepper, chopped onion, and garlic and stir fry til just soft.
Season w dried oregano, chili powder, salt and pepper, and return the meat to the pan along w a couple handfuls of good tortilla chips and some crumbled queso fresco. Toss til chips are well coated and serve w salsa drizzled on top.
Garnishes: fresh cilantro, sour cream, guacamole, chopped tomato, black olives.