The Spanish tortilla de patata is a staple dish anywhere you go – eggs and thinly sliced potatoes fried in a pan atop a layer of olive oil. Join in the big debate: to include onions or not. Everyone has an opinion! Juana la Loca in Madrid boasts one of the most delicate, flavorful tortillas. While I have had one or two that I found more delicious, this one melted in my mouth, with caramelized flavors.

Eds. note: Read more about food in Madrid here.