Portobello Mushroom Pitas

INGREDIENTS

• 1/2 cup Hellmann's® or Best Foods® Light Mayonnaise
• 1/4 cup grated Parmesan cheese
• 2 Tbsp. chopped fresh basil leaves or 1 tsp. dried basil leaves, crushed
• 1 clove garlic, finely chopped
• 1/4 tsp. salt
• 4 portobello mushroom caps (about 3/4 lb.)
• 2 medium red onions, cut into 1/4-inch-thick rounds
• Lettuce leaves
• 1 medium tomato, thinly sliced
• 4 large whole wheat pita breads