These carne asada tacos are marinated, grilled, sliced, and served in tortillas with cojita cheese and charred onion relish. Make extra...they're addictive!
Place flank steak in a large ziploc bag and pour marinade over steak. Seal bag and turn several times until steak is well coated.
Remove steak from marinade and season liberally on both sides with salt and pepper. Grill over high heat for about 5 minutes per side.
Grill about 3-5 minutes per side or until slightly charred, being careful as you flip them so they don't fall through the grates. Remove to a plate.
Slice the rested steak thinly, against the grain, to serve.
Reduce the heat on the grill to medium and grill the tortillas until warmed through and charred slightly (to your liking).
To serve: top each tortilla with a couple slices of steak, a sprinkling of cheese, chopped cilantro, onion relish, and a squirt of lime juice. Serve with lime wedges if desired.