Loaded Broccoli Casserole

Name: Loaded Broccoli Casserole
Cook time: 55 min
Total time: 55 min
Cuisine: American
Ingredients: 3 slices bacon; 1.5 pounds broccoli crowns, cut into bite-size florets; 0.5 teaspoon ground pepper; 0.25 teaspoon salt; 1 tablespoon extra-virgin olive oil (if needed); 1.5 cups shredded extra-sharp Cheddar cheese, divided; 0.66 cup reduced-fat sour cream; 4 scallions, sliced, divided