Square pizzas are great for anyone who doesn’t have a pizza stone: We are going to stretch the dough over a greased baking sheet, then let the dough rise again before topping it with homemade meatballs and a roasted pepper honey.
For the pizza: Grease the bottom of a 13-by-9-inch rimmed baking sheet with the oil. Use your fingers to spread and stretch the dough super thin to fill the baking sheet. Cover with a clean towel or plastic wrap and let sit at room temperature until the dough is slightly puffed, about 1 hour.
For the roasted pepper honey: Place the pepper over an open flame over high heat. Roast, using tongs to turn on all sides, until completely black, 2 to 3 minutes per side. Transfer the pepper to a paper bag (or to a large bowl covered with plastic), fold the bag closed and steam, about 10 minutes. Transfer the pepper to a cutting board, cut in half and scrape out and discard the seeds. Turn the pepper over and use a kitchen towel to wipe the charred skin from the outside (do not rinse). Add the pepper, honey, oil, crushed red pepper flakes if using and salt to taste to a blender and blend until smooth. Set aside or keep in a glass jar with a lid in the refrigerator up to 2 weeks. Makes about 1 cup.
Gently spread the tomato sauce on top of the dough, then top with the mozzarella. Break the meatballs into small pieces and layer on top of the pizza. Sprinkle with half the basil and drizzle with olive oil. Top with half the pecorino and the oregano.
Bake until crisped and browned, 4 to 5 minutes. Remove the baking sheet from the oven and place it on the stove over medium heat to gently fry the bottom of the pizza until crisp, 1 to 2 minutes. Sprinkle with the remaining basil and drizzle with about 1 tablespoon of the roasted pepper honey and additional olive oil. Sprinkle with the remaining pecorino, slice the hot pizza and serve immediately.
Combine the bread, milk and pepper to taste in a large bowl and mix with your hands until a paste forms. Add the beef, pork, veal, pecorino, garlic, egg, parsley and a pinch each salt and pepper, then use your hands to gently combine.
Heat 2 tablespoons of the oil in a large skillet over medium heat. Scoop about six 1-inch chunks of the meatball mixture into the skillet and cook, turning occasionally, until all sides are browned, 6 to 7 minutes total. Use a slotted spoon to transfer the meatballs to a kitchen towel or plate and let cool completely, about 1 hour.
Repeat with the remaining oil and meatball mixture or freeze: Arrange the remaining uncooked meatballs in a single layer on a baking sheet and freeze until solid. Transfer the frozen uncooked meatballs to a freezer bag or freezer-safe container and store up to 2 months. Makes 20 meatballs.