How to Make Broccoli Gratin
- 1Place broccoli in a steamer over boiling water. Steam for 10 minutes. Place broccoli in a lightly greased 13x9 inch baking dish.
- 2Melt butter in a saucepan over medium heat; whisk in flour until smooth. Cook 1 minute until and whisk constantly, until bubbly.
- 3Stir in mustard and next 3 inredients.
- 4Pour sauce over broccli; sprinkle with cheese. Broil until lightly browned. Serve immediately.