Portobello Mushroom Pitas

Ingredients

• 1/2 cup (125 mL) Hellmann's® with Olive Oil ½ the Fat mayonnaise-type dressing
• 1/4 cup (50 mL) grated Pecorino Romano cheese
• 2 Tbsp. (30 mL) fresh basil leaves
• 1 clove garlic, finely chopped
• 1/4 tsp. (1 mL) salt
• 4 portobello mushroom caps, (about 3/4 lb/ 375 g)
• 2 red onions, cut into 1/4-inch (6 mm) thick rounds
• 1 medium tomato, thinly sliced
• 4 large whole wheat pita breads