Broccoli and Gruyere Au Gratin~Lisa Esplin fr. 'Real Simple'

Serves 8Hands-On Time: 15mTotal Time: 1hr 00m
Ingredients
2 large bunches broccoli, roughly chopped (about 12 cups)4 tablespoons butter (1/2 stick)1/4 cup all-purpose flour2 cups whole milk2 cups grated Gruyere (8 ounces)kosher salt and black pepper

Directions

1. Heat oven to 375° F. Fill a large saucepan with 1 inch of water and fit with a steamer basket (or fill a large pot with ½ inch of water). Bring to a simmer. Place the broccoli in the steamer basket, cover, and steam until just tender, 3 to 4 minutes; transfer to a large bowl.
2. Melt the butter in a medium saucepan over medium heat. Add the flour and cook, stirring, for 2 minutes (do not let it darken). Whisk in the milk and simmer until slightly thickened, 3 to 4 minutes. Remove from heat and stir in 1 cup of the cheese, ½ teaspoon salt, and ¼ teaspoon pepper. Toss with the broccoli.
3. Transfer the broccoli mixture to a shallow 3-quart baking dish and sprinkle with the remaining cup of cheese. Bake until bubbling and golden brown, 35 to 40 minutes. Let sit 10 minutes before serving.