Spaghetti Pizza Pie

Name: Spaghetti Pizza Pie
Ingredients: 4 large eggs; 1/2 cup grated Parmesan; 1 teaspoon garlic powder; 1 teaspoon dried oregano; 1 teaspoon crushed red pepper flakes; 2 1/4 cups pizza sauce; Kosher salt and freshly ground black pepper; 1 1/2 cups grated mozzarella; 8 ounces spaghetti, cooked and cooled; 1 tablespoon olive oil; 1 cup cooked, crumbled sausage; 5 thinly sliced green bell pepper rings; 1/4 cup sliced red onions; 1/4 cup sliced black olives; Basil leaves or arugula, for garnish