Step 1: Preheat your oven to 425°F (220°C). Grease a 9-inch deep dish pizza pan or cast iron skillet with olive oil.
Step 2: Press the pizza dough into the prepared pan, working it up the sides to form a crust. Drizzle 1 tablespoon of olive oil over the crust.
Step 3: In a large skillet, brown the ground beef and beef sausage over medium-high heat, breaking it apart with a spoon. Drain off any excess grease.
Step 4: Add the chopped onion and minced garlic to the skillet with the cooked meat. Cook until the onion softens, about 5-7 minutes. Stir in the Italian seasoning.
Step 5: Spread half of the mozzarella cheese evenly over the bottom of the pizza crust.
Step 6: Spoon the cooked meat mixture over the mozzarella cheese layer.
Step 7: In a bowl, combine the crushed tomatoes, sugar, salt, and black pepper. Pour this tomato sauce evenly over the meat layer.
Step 8: Top with the remaining mozzarella cheese and the grated Parmesan cheese. Arrange the pepperoni slices over the cheese.
Step 9: Bake for 25-35 minutes, or until the crust is golden brown and the cheese is bubbly and slightly browned. If the crust edges brown too quickly, you can cover them loosely with aluminum foil.
Step 10: Let the pizza rest for 5-10 minutes before slicing and serving. This helps the cheese set and prevents the filling from spilling out.