Step 1

Steam or microwave (about 3 minutes on HIGH) chopped broccoli and stems until tender but still bright green. Squeeze lemon over broccoli.

Step 2

Melt butter in skillet. Add onions, garlic, celery and mushrooms and saute until softened. Stir in flour and cook about one minute to take away the raw flour taste. Whisk in milk and continue whisking until slightly thickened. Season with salt and pepper. Add 1 1/2 cup cheese and stir to melt.

Step 3

Combine broccoli, rice, and cheese sauce. Turn into 1 1/2 quart greased casserole dish. Sprinkle with remaining 1/2 cup cheese. Bake at 350 degrees F until bubbly (around 30 minutes).