I'm using an exchange plan, and on plan I get two or three fruit servings (about 60 calories each). I like bananas, but they're not my favorite fruit, and I especially hate spending 2 fruits to eat one, but I also hate leaving half a banana for later. Hubby HATES bananas, so there isn't the option to share.
Fingerling bananas are the perfect solution (if you can find them for a reasonable price, and if you can find them at all). I've bought tiny bananas before from the asian markets, and today I actually weighed them and calculated their calorie comparison to regular bananas. A medium banana has about 100 calories, and a large banana about 125. In general, about 25 calories per ounce, so the baby bananas I bought have 25 - 30 calories each. So two of the tiny bananas are 1 serving of fruit.
The ones I bought were about the diameter of a nickel and about 4 inches long and weighed about an ounce each.