Step 1

Preheat a grill to medium-high heat.

Step 2

In a small bowl, combine the chili powder, sugar, garlic powder, onion powder, salt and pepper.

Step 3

Use a pastry brush to coat both sides of the bell peppers, onions and scallions with some of the oil, then sprinkle with a quarter of the spice mix. Pat the steaks dry with a paper towel, then brush with the remaining canola oil and season with the remaining spice mix.

Step 4

Grill the steaks until grill marks appear and they start to char slightly, about 3 minutes per side for medium rare. Grill the peppers, onions and scallions until grill marks appear, 3 to 4 minutes per side. Remove everything to a cutting board. Coarsely chop the vegetables first to allow the steaks some time to rest. Slice the steaks against the grain into thin slices.

Step 5

Serve with the warm flour tortillas (I like to wrap a stack of tortillas in foil and warm on the grill) and sour cream, lettuce, guacamole, cheese and lime wedges.