Prepare Dough: Make homemade pizza dough or use store-bought. Divide into 4 equal pieces and let it proof.
1 Pizza dough
Make Dipping Sauce: Sauté grated onion and garlic in olive oil. Blend tomatoes, salt, sugar, red pepper flakes, and Italian seasoning. Add to the pan and simmer for 30 minutes until thickened.
28 oz Crushed tomatoes, 1/2 Onion, 1 tbsp Sugar, 1 tsp Kosher salt, 1 tbsp Italian seasoning, 1/4 tsp Red pepper flakes, 3 Garlic cloves
Cook Sausage: Heat olive oil in a skillet, cook onions for 2 minutes. Add sausage, break into pieces, and cook until browned. Drain excess fat.
1 lb Italian sausage, 1 tbsp Olive oil, 1/2 Onion
Assemble Calzones: Roll each dough piece into an 8-9 inch circle. Add sausage, roasted red peppers, red onion, ricotta, mozzarella, and Romano cheese, leaving a 1-inch border.
1/2 cup Roasted red peppers, 1/2 cup Red onion, 1/2 cup Ricotta cheese, 1/2 cup Mozzarella cheese, 4 tbsp Romano cheese
Fold and Seal: Fold dough over filling to form a half-circle. Press edges to seal and crimp with a fork.
Bake: Preheat oven to 450°F. Place calzones on a parchment-lined baking sheet, brush with egg wash, cut vents, and bake for 15 minutes or until golden brown.
1 Egg, 1 tbsp Water
Serve: Let cool for 4-5 minutes, then serve with dipping sauce.
Notes
Store calzones in an airtight container in the fridge for up to 3 days. Reheat in a 350°F oven for 10-15 minutes for best texture, or microwave for a quick option.