Which is the easiest and healthiest food to prepare?

Potatoes.

There are countless ways to make them.

Numerous varieties of potatoes exist (or previously did), numbering in the hundreds of thousands.

They can be consumed on their own or with other foods.

as an appetiser, entrée, main course, or dessert.

You may replant them and have more grow if you put them in your cupboard and forget about them. On your balcony, in a discarded paint bucket, in a kiddie pool, or in a laundry basket.

When the plant appears to be dead, a brand-new crop has been produced. Life from death.