Italian Egg Bread Bowl

Name: Italian Egg Bread Bowl
Ingredients: 1 round loaf good-quality Italian bread; Olive oil, for drizzling, plus 2 tablespoons; Kosher salt and freshly ground black pepper; 8 ounces loose sweet Italian sausage; 1 small Spanish onion, halved and thinly sliced; 1 green bell pepper, thinly sliced; 1 red bell pepper, thinly sliced; 2 jarred Calabrian chiles, thinly sliced; 1/4 cup chopped fresh flat-leaf parsley; 2 tablespoons torn fresh basil; 10 large eggs, whisked until frothy; 6 ounces grated provolone; 1/4 cup grated Parmesan