Potatoes is the right answer.
People of South America and of the Inca empire grew potatoes about hundreds of years ago. English pioneers introduced potatoes in Europe around the mid-1500s. Europeans used the potatoes for non-food purposes.
Spaniards had a vast empire across Europe hence, they took potatoes for their soldiers. During the course of time, farmers became aware of the crop and started its cultivation. Potato then became a common staple crop to be grown in the land of England, Scotland and Ireland.