Preheat outdoor grill to medium heat; spray grill grid and grill skillet with nonstick cooking spray. Cut pepper in half; remove core and seeds. Cut lengthwise, in 1/2 to 1 inch strips. Cut tomatoes and onion into 1/2 inch slices. Wash basil and remove stems. Whisk salt and pepper with olive oil. Brush both sides of mushroom caps with seasoned oil. Place on grill grate and cook until tender. Remove and keep warm. Brush pepper strips and onion slices with seasoned oil; put in grill skillet and place on grill. Cook until tender. Separate the buns and lightly brush halves with seasoned oil; place halves, oil side down, on grill grate; grill until warm with grill marks. On the bottom bun, add 1 slice mozzarella cheese. Heat until slightly melted. Remove from grill. On top of the cheese, add one grilled mushroom cap, one tomato slice, one slice grilled onion, four grilled pepper strips and four basil leaves. Spread top half of bun with one tablespoon hummus and add to sandwich.
Buying Kentucky Proud is easy. Look for the label at your grocery store, farmers' market, or roadside stand.