1 1/4 pounds broccoli
1 tablespoon butter
1 tablespoon flour
2 teaspoons Dijon mustard
1 cup milk
1/3 cup shredded cheddar cheese
1/2 teaspoon coarse salt
1/4 teaspoon ground pepper
Recipe
Steam broccoli; transfer to a large bowl.
Heat butter in a small saucepan over medium heat until foamy. Whisk in flour; cook, whisking, until mixture darkens slightly, 2 to 3 minutes. Add mustard and milk; simmer, whisking, until thickened, 3 to 5 minutes. Remove from heat.
Stir in cheese until just melted; season with salt and pepper. Pour sauce over broccoli; serve.