1-First, prepare the pizza dough and let it rest for 1 hour. This helps it become easy to work with. Next, cook the sausage in a skillet until it’s browned, then set it aside to cool.

2-Then, sauté the onion in 1 teaspoon of olive oil until it softens. Add the sliced red bell pepper and 1/3 cup spicy tomato sauce, then simmer covered for 15 minutes until tender. Let this mixture cool completely before you move on.

3-Preheat your oven to 500°F and place it on the center rack. Oil a sheet pan to prevent sticking. Roll out the dough into a 16×10 inch rectangle on a floured surface.

4-Assembling and Baking Spread the cooled pepper-onion mixture over the dough, leaving a 1.5-inch border around the edges. Top it with the cooked sausage and 3/4 cup shredded mozzarella cheese. Brush the edges with the beaten egg white to help seal everything.

5-Fold the long sides over the filling first, then fold the short ends and pinch to seal. Place it seam-side down on the prepared pan. Cut a few slits on top for steam to escape, brush with more egg white, and sprinkle sesame seeds if you like.

6-Bake at 500°F for 10 minutes, then reduce the heat to 375°F and bake for another 18-20 minutes until it’s golden brown. For ideas on similar dishes, try this onion and pepper kielbasa recipe for a tasty variation.

7-Let it cool a bit before slicing into 8 pieces. The total prep time is about 10 minutes, cooking takes 50 minutes, plus 1 hour for dough resting, making the whole process around 2 hours.