What three primary ingredients define the core of the deceptively simple Tortilla Española?

Answer

Eggs, potatoes, and olive oil

The Spanish Omelette, or Tortilla Española, is celebrated for its minimalist execution, relying fundamentally on only three core ingredients: eggs, potatoes, and olive oil, with salt being an assumed necessity. The technique surrounding these simple components is paramount; specifically, the potatoes must be fried slowly in olive oil until tender before being incorporated into the beaten eggs. The density and substantial nature of the final product, which functions more like a dense frittata than a delicate omelet, depend entirely on the quality and preparation of these basic elements.

What three primary ingredients define the core of the deceptively simple Tortilla Española?
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