Open-Faced Sweet Potato "Sandwich"

Ingredients (6)

• 1 red bell pepper seeded and thinly sliced
• 1 small zucchini thinly sliced lengthwise
• 2 medium sweet potatoes
• 1 nonstick cooking spray
• 1 tsp salt-free seasoning like Mrs. Dash
• 2 slice Swiss cheese 1-ounce each, reduced-fat