This recipe, adapted from the cookbook “The Family Meal: Home Cooking With Ferran Adrià” (Phaidon, 2011), is a study in simplicity. The chef of El Bulli, the famous Spanish restaurant, Mr. Adrià created an omelet reminiscent of a Spanish tortilla that comes together in minutes using only eggs, salted potato chips and olive oil. As with any recipe calling for just a few ingredients, quality truly matters here, so opt for the best potato chips, the finest olive oil and the freshest eggs.