1. Preheat broiler to high.
2. Hollow out top and bottom halves of bread, leaving a 1/2-inch-thick shell; reserve torn bread for another use. Place rolls, cut sides up, on a baking sheet. Broil 1 minute or until toasted.
3. Heat a large skillet over medium-high heat. Add oil to pan; swirl to coat. Add onion and next 5 ingredients (through black pepper); sauté 5 minutes or until vegetables are tender.
4. Spread about 1/4 cup hummus over bottom half of each roll; top with 1/2 cup onion mixture and 1 cheese slice. Broil 2 minutes or until cheese melts. Top hoagies with top halves of rolls.