Heat a grill to high heat.
Lay the steak slices on the grill and sprinkle with salt and black pepper. Grill to medium-rare, 4 minutes per side, or longer if desired. Remove and tent with foil while you prepare the vegetables.
Place a grill pan
over high heat and spray with canola oil. Add the onions
and bell peppers
, season with salt and black pepper and grill until well-marked and have softened, about 10 minutes. Reduce the heat and push the vegetables to the middle of the grill pan, then top with the provolone cheese
and let melt
Arrange the lettuce cups on a platter. Divide the peppers and onions among the lettuce cups and top with the steak slices.
Nutrition Analysis Per Serving: 150 calories, 8 g total fat