Buffalo Rotisserie Chicken Casserole

Ingredients

• 1/3 cup all-purpose flour
• 4 cups 2% reduced-fat milk, divided
• 2 (8.8-ounce) packages microwavable brown rice, cooked
• 3 cups fresh broccoli florets
• 1 cup carrots, finely chopped
• 1 rotisserie chicken, shredded
• 6 ounces reduced-fat extra-sharp cheddar cheese, shredded
• 2 tablespoons Buffalo-style hot sauce, plus more, to taste, for serving
• 2 tablespoons fresh dill, chopped, divided
• 3/4 teaspoon garlic powder
• 3/4 teaspoon kosher salt
• 1/2 teaspoon black pepper
• 1/2 cup whole-wheat panko breadcrumbs
• 1 tablespoon canola oil