Preheat the oven to 400 F.
Lightly coat a baking sheet with cooking spray.
In a small bowl, add the asparagus, tomatoes and pepper. Add the garlic and toss gently to coat evenly. Arrange the French bread on the prepared baking sheet. Add 1/4 cup of the pizza sauce and 1/4 of the vegetable mixture to each section. Sprinkle each section with 1/4 cup mozzarella cheese.
Bake until the cheese is lightly browned and the vegetables are tender, about 8 to 10 minutes.
Serve right away.