Dorie Greenspan's book, Around My French Table, includes a variety of dishes that have come into France from other cultures, near and far. In the case of the Basque Tortilla, France borrowed at least the name of the dish from the area across the Pyrennes. This recipe has a Spanish name - "tortilla" - although we'd be tempted to call this fluffy egg dish a frittata or an omelet.
- I skipped the tricky math and figured that my mushrooms would be about the correct amount for 2/3 recipe of the Basque Tortilla. That meant I needed 6 large eggs; I got out my scale and measured out the equivalent weight of fresh eggs from my farm box. 3 enormous duck eggs and 2 of the smaller chicken eggs were the perfect amount. I used my small cast iron skillet.- The recipe couldn't be easier: mix the filling and eggs, then cook nice and slowly on top of the stove, with a few swipes of a silicone spatula to make sure the sides don't stick to the side of the skillet. When the center is nearly cooked the skillet is broiled until the eggs are just set. Under the broiler the tortilla puffs and browns beautifully.
The hot "tortilla" made for a lovely dinner with pumpkin soup and a green salad. The very center of the tortilla was like custard even though there was no dairy added to the eggs. The mushrooms/onion filling gave a savory, almost earthy, set of flavors to the eggs. Next time I might add a bit of prosciutto. Leftovers were quite nice for lunch the next day, served at room temperature as Dorie suggests. In fact, I preferred the barely-warm serving to the one that I ate when it was hot.