Meat Lite: Tortilla Espanola Con Chorizo

Name: Meat Lite: Tortilla Espanola Con Chorizo
Ingredients: 1 medium onion, quartered and very thinly sliced; 2 big potatoes (about 1 pound), quartered and very thinly sliced; 2 to 4 ounces dried Spanish chorizo, diced; 1/4 cup olive oil, plus 2 tablespoons, divided; 3/4 teaspoon salt, divided; 6 eggs, beaten; Freshly ground black pepper