On a lightly floured surface, roll out each roll into an 8-in. to 10-in. circle, turning dough frequently; set aside.
In a large skillet, saute garlic in oil until tender. Add mushrooms; saute for 2-3 minutes. Add the onion, peppers, peas, salt, pepper and oregano; cook 3 minutes or until crisp-tender.
Meanwhile, grill bread, uncovered, over medium-high heat for 30-45 seconds on each side or until lightly browned. Fill with vegetable mixture and serve immediately. The bread can be reheated in the microwave.