This is a standard in any tapas bar --Tortilla Española, a simple omelet of potatoes and onions. Serve it up hot or cold, with a side of mayonnaise or spiced ketchup.

This is a standard in any tapas bar --Tortilla Española, a simple omelet of potatoes and onions. Serve it up hot or cold, with a side of mayonnaise or spiced ketchup.