Ingredients
1 large portobello mushroom, stem removed1 teaspoon olive oil1/8 teaspoon dried oreganoSalt and pepper, to taste1 plum tomato, chopped2 pitted green olives, chopped1 tablespoon mayonnaise1 multigrain hamburger bun, split and toasted1 lettuce leaf1 slice provolone cheese
Preparation
Brush mushroom with oil and sprinkle with oregano. Season with salt and pepper. Using long-handled tongs, moisten a paper towel with cooking oil and lightly coat the grill rack. Grill mushroom, covered, over medium heat or broil 4 in. from the heat for 6-8 minutes on each side or until tender.
Combine tomato and olives; season with salt and pepper. Spread mayonnaise over bun bottom. Top with lettuce, mushroom, cheese and tomato mixture; replace bun top.
