Tortilla de Papa y Cebolla a la Espanola (Spanish Potato & Onion Tortilla) - Upper Arlington Public

Ingredients

• 1/2 onion
• 4 potatoes (medium)
• 4 eggs
• 1/4 cup milk (up to 1/2 c, if needed)
• 1 tablespoon salt
• pepper
• 2 tablespoon Spanish or Italian olive oil