Grilled Portobello and Arugula Burgers

• 1/2 cup nonfat mayonnaisemayonnaise
• 2 teaspoons Dijon mustarddijon-mustard
• 6 teaspoons minced fresh rosemaryrosemary
• 1 garlic clove, mincedgarlic
• Nonstick vegetable oil spray
• 4 large portobello mushrooms, stems trimmedportobello-mushroom
• 2 tablespoons olive oilolive-oil
• 4 whole wheat buns, toasted
• 2 large bunches arugulaarugula

1. 01Mix mayonnaise, mustard, 2 teaspoons rosemary and garlic in small bowl.
2. 02Spray grill rack with nonstick spray, then prepare barbecue (medium heat). Brush mushrooms all over with olive oil. Sprinkle each with 1 teaspoon rosemary, then salt and pepper. Grill until tender, about 10 minutes per side.
3. 03Spread mayonnaise mixture over buns. Place mushrooms and arugula on bun bottoms. Cover with bun tops.

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