Ingredients

Butter for the casserole dish
1 onion, diced
10 oz frozen chopped spinach
8 eggs
1 lb of chorizo (uncooked)
2 cups of cheese, shredded

Method

Fry the chorizo and onions together till done. It's hard to tell visually when chorizo is done, but fry it for about ten minutes. Chop and drain the thawed spinach. Preheat oven to 300°F. Butter the casserole dish. Mix chorizo, onions, spinach together. Let cool till you can mix them with eggs and cheese without the eggs immediately cooking. Beat ingredients together. Put in buttered 8x8 casserole. Cook 55 minutes without opening the oven, remove, let sit 15 minutes.

Very tasty. This can now be a standard recipe, I think.

2014-04-30: here is my fourth variation. This time I used beef chorizo, skipped the onion, used eight eggs. Initial cooking time 55 minuytes without interruption, then let it sit 15 minutes. Turned out great. I have now concluded these 8-egg recipes are good at 55 minutes, whereas the 5 egg recipes are good at 40 minutes. I also concluded that if you have bought frozen spinach, you really don't need to boil it before putting it in the mix. Just be sure it is at room temperature and squeeze excess water out, then chop it up fine.

Reheating of one slice (1/4 of the quiche) in my microwave works well over 4 minutes at power level 4.