Impossible chicken-broccoli pie

2 cans chunk chicken drained
1 10oz pkg frozen chopped broccoli
1 1/2 c shredded cheddar cheese
1 c milk
3 eggs
1/2 c Bisquick
1/4 t seasoned salt
1/4 t pepper

Heat oven to 400. Layer chicken, broccoli and cheese in greased pie pan, x 1 1/ inches. Beat remaining ingredients 15 seconds in blender on high. Pour in pan. Bake 20 minutes. Sprinkle topping. Bake until knife comes out clean, 15 -2o minutes. Cool 5 minutes. Serves 4 - 6

Topping Mix:
1/2 c bisquick
1/4 c chopped nuts
1/2 c Parmesan cheese
1/8 t garlic powder
2 T firm butter