Zucchini Quiche

This is a "recipe" I got on my mission one of my in-laws has a garden and got zucchini and it made me think of this recipe.

First of all I am translating this and to explain the Uruguayos aren't to big on measuring anything so things are approximate.

Crust
for 30 x 40 cm pan (about 12 x 16 inches?) 9x13 and it may be thick...
or for a 16 inch diameter round
2 cups flour, 100g butter ( 1 stick is about 110 grams by someone on wiki.answers.com)
1 egg, 1 teaspoon salt, 2 Tb vinegar
Mix with 1Tb baking powder
Mix to soft dough you can spread to size of pan
Add squash mix and bake

Squash Mix (Zucchini is a squash and very tasty for this recipe)
Fry 2 small onions in oil or butter
Add 6 or 7 chopped squash until cooked
add salt, oregano, grated cheese*, a little creme or milk (1/2 cup)
Remove from heat and add 3 to 4 eggs
Stir well add to crust
Bake 30 to 40 minutes at 180-200 degrees Celsius (356 to 392 F)

*Cheese: not sure exactly what cheese this was might have been a mozzarella leave comments if you have suggestions or questions on things that don't quite fit

Thanks