Chicken Divan

Ingredients

• 2 (10 oz.) pkg. frozen broccoli spears, thawed
• 3 c. chopped cooked chicken breast (about 1 1/2 lb. boned, skinned breasts)
• 1/2 c. (2 oz.) shredded reduced-fat sharp Cheddar cheese
• 1 1/4 c. skim milk
• 1 (10 3/4 oz.) can 1/3-less salt cream of mushroom soup, undiluted
• 1 tsp. lemon juice
• 1/8 tsp. salt
• 1/8 tsp. pepper
• 3 Tbsp. all-purpose flour
• 3 Tbsp. water
• 1/2 c. finely crushed onion-flavored Melba toast rounds (about 19)
• 1 Tbsp. margarine, melted
• 3 red bell pepper rings (optional)
• 1 lb. mushrooms, sliced