Set out a scale and the equipment for Beef fajitas. Heat to a hot grate, about 450°F / 232°C and give it 5 minutes so the surface is actually hot. Weigh beef sirloin, red bell pepper, yellow onion, lime juice, ground cumin, chili flakes, flour tortilla, cilantro, kosher salt, olive oil. Beef fajitas is cooked in Tex-Mex as its own plate, not as a copy of a restaurant menu. Sear the beef and vegetables very hot so they char at the edges, and serve them with warm tortillas and lime. Amounts are for 4 from foods this library can count.