Upside-Down Popover Pizza

Ingredients

• 1 lb pork sausage
• 1 onion, chopped (medium)
• 1/2 green pepper, chopped (medium)
• 2 tablespoons all-purpose flour
• 1/2 teaspoon dried basil
• 1/2 teaspoon marjoram leaves, crumbled
• 15 ounces tomato sauce
• 8 ounces mozzarella cheese, sliced
• 1/4 cup parmesan cheese, grated
• popover batter
• 2 eggs
• 1 cup all-purpose flour
• 1 cup milk
• 1 tablespoon oil
• 1/4 teaspoon salt