Fill a pot with cold water and put in diced potatoes cook for 15 minutes. Saute chorizo in pan with a tbs. of olive oil. Drain potatoes an add to the pan with chorizo in it. Cook for 5 minute until potatoes brown a little. Turn off heat and let them cool down.
Get your pie crust ready in your pie plates. Add 1/4 of the cheeses in the bottom of each pie crust so when the custard cooks it won't seep through and make the pie crust soggy. In a large bowl add half and half, eggs, cheese, some salt and pepper about a 1/4 and a teaspoon of salt and pepper. Divide potato mixture between both pie plates add olives and green onions to both.
Add half of the egg mixture to one pie and the rest to the other. Cook in a 400 degree preheated oven for 30 minutes. Let it cool for 1 hour so the eggs can set.