Portobello, Broccoli, and Red-Pepper Melts

INGREDIENTS

• 1 small head broccoli, cut into small florets (stalk discarded)
• 1 tablespoon olive oil
• Coarse salt and ground pepper
• 4 portobello mushrooms (stems removed), sliced 1/2 inch thick
• 2 red bell peppers (ribs and seeds removed), sliced 1/2 inch thick
• 1/4 cup light mayonnaise
• 1 small garlic clove, crushed through a press
• 4 thick slices country bread
• 4 ounces Gouda cheese, thinly sliced