Broccoli gratin with crispy onions recipe

Ingredients

• 2 tablespoons butter
• 2 tablespoons all-purpose flour
• 2 cups whole milk
• 1 bunch broccoli, chopped (6 cups)
• Kosher salt and black pepper
• 2 cups grated fontina (8 ounces)
• 1 cup French-fried onions

1. Cook the butter and flour in a large saucepan over medium heat, whisking, for 1 minute. Whisk in the milk.
2. Add the butter and flour in a large saucepan over medium heat, whisking, for 1 minute. Whisk in the milk.
3. Add the fontina, transfer to a baking dish, and top with the French-fried onions. Bake at 350°F until browned, 5 to 7 minutes.