Ham and Spinach Quiche

This was sooooooooooo good! Even Corrine ate it and she's my egg-hater!

Deep Dish Ham and Spinach Quiche(6 servings)
1 9" deep dish frozen pie crust
5 slices sandwich ham - chopped (I used regular cubed ham--two handfuls)
1/2 of an onion - chopped
1/2 package frozen spinach - thawed and drained (I used the whole package)
2 Tablespoons ricotta cheese
2 cups shredded Italian 5 blend cheese
1 cup milk
6 large eggs
salt and pepper - to taste

Preheat oven to 400.In a bowl, combine all ingredients.Pour into deep dish pie crust and bake for 1 hour.