1/4 c. olive oil
2 Tbsp. balsamic vinegar
1/2 tsp. dried basil leaves, crushed
1/4 tsp. salt
1 (6 oz.) pkg. portabella mushroom caps
Italian bread, sliced 1-inch thick
Mozzarella cheese, sliced
tomato, sliced
chopped fresh basil leaves

In medium nonmetal bowl, combine first 4 ingredients. Add mushrooms; toss to coat well. Cover; marinate 1 to 2 hours, stirring occasionally.

Remove mushrooms from marinade; reserve marinade. Grill mushrooms 6 to 8 minutes or until crisp on the surface, turning often. Brush bread with remaining marinade; grill until lightly toasted.

To serve: Top each bread slice with a grilled mushroom, a slice of cheese and tomato; garnish with fresh basil. Serve immediately.