Deep Dish Ham and Asparagus Quiche

extra virgin olive oil

large onions (yellow, Vidalia, sweet, etc., thinly sliced)

water

cooked ham, (cubed)

small bunch asparagus, (trimmed and cut into small pieces)

shredded cheese, (Swiss or Monterey Jack)

eggs

heavy cream

salt and pepper

store-bought refrigerated pie crust or make your own