Spinach quiche

IMPOSSIBLE SPINACH PIE QUICHE

1 (10 oz.) pkg. frozen spinach, thawed an drained
1 c. shredded Swiss cheese
1/2 c. onions, chopped
1 1/2 c. milk
3 eggs
3/4 c. Bisquick baking mix
1 tsp. salt
1/4 tsp. pepper
1/4 tsp. ground nutmeg
Chopped ham, if desired

Heat oven to 400 degrees. Grease a 10 x 1 1/2 inch pie plate. Mix spinach, cheese, onion, and ham in plate. Beat remaining ingredients until smooth. Pour into plate. Bake until knife inserted in middle comes out clean, about 30 minutes. Cool 6 minutes. Serves 6.