Chicken Broccoli Quiche

Hark and gasp! My two youngest, 3 and 4 years old, went to TOWN on this!  I was amazed—around here that's practically a miracle! And my husband and I both went back for seconds. SOOOO GOOD!

2 c. shredded Sharp Cheddar cheese
1/2 cup powdered Parmesan [from can]
1 c. cooked chicken, cubed or shredded
2/3 c. chopped onion [ or heaping TB dried onion flakes, or 1 heaping tsp onion powder]
1/4 tsp garlic powder
1 pkg. frozen broccoli (thawed)- Recipe actually uses roughly 3 cups
1 c. milk [I used skim with great results]
1/2 cup sour cream [I used reduced fat]
5 eggs
3/4 c. Bisquick mix
3/4 tsp. salt
1/4 tsp. pepper
** Also, optionally, this is delightful with 2 oz. low fat cream cheese cut up into small pieces and added in**
Grease quiche pan or 9" deep dish pie plate. Layer chicken, 1 cup cheddar cheese, then broccoli.
Beat eggs, Bisquick, powdered Parmesan, spices, and milk until smooth. Pour into pan. Top with remaining Cheddar.
Bake at 400 for 60-75minutes<lay sheet of aluminum foil lightly over quiche at 45 minutes>. Quiche is done when knife in center comes out mostly dry.