You're stuck on a desert island. You have access to all the island provides: shrubbery, some trees, and sea life. But to make this existence bearable, you also get to choose 1 single food item to have with you at all times. You don't have a fridge, but any time you run out of your item, or if it goes bad, a fresh supply is air dropped to you by plane. How is this possible? Let's not ask too many questions.
Things to consider:
Nutrition - will your choice satisfy nutritional needs not found in other desert island food options?
Versatility - will your choice be something you can use in cooking (or eslewhere) to make a variety of other things?
Deliciousness - will your choice be a special treat that provides little value beyond just being delicious?
What will you choose?