Salad Pizza

Ingredients

• 1 lb pizza or bread dough (thawed if frozen)
• 2 tbsp yellow cornmeal
• 1/4 cup Parmesan cheese (grated)
• 2 tbsp balsamic vinegar
• 1 tbsp Dijon mustard
• 1 tsp light brown sugar
• 1/4 tsp salt
• 12 oz plum tomatoes (cut into 1/2-inch wedges)
• 1 red onion (halved and thinly sliced)
• 2 cups fat-free mozzarella (shredded)
• 6 cups mixed salad greens (torn into bite-size pieces)