Seafood Pizza

Ingredients

• cornmeal (for sprinkling)
• 1 Tbsp. oil
• 1/4 c. minced onion
• 1 clove garlic, minced
• 1 (35 oz.) can whole tomatoes, crushed and drained (2 c.)
• 1 Tbsp. chopped fresh parsley
• 1/3 tsp. crushed red pepper
• 1/8 tsp. salt
• pizza dough for one 12-inch pie
• 1/2 lb. medium shrimp, peeled and deveined
• 1 (6 1/2 oz.) can chopped clams, drained
• 2 Tbsp. grated Parmesan cheese