Fruits is a common but some hard to purposefully collect resource since it has very few set locations (many of which are commonly expired) and most of these spread out. The best way to collect items that give it is to search everything in a map since food items are somewhat common.
Probably the best source of fruit is from farming as a strawberry bush can give 7-10 fruits.
|3 + 1||Fruit salad|
|1 (x2)||Canned peaches|