Don't worry about it. Seriously. Make food, if they eat it, great, if not, great.
My kids don't eat a lot of veggies, but they will eat almost any fruit -- they did pass on a dragon fruit from Thailand, but it was like kiwi and the one we got wasn't very sweet.
I honestly don't worry about it. They eat carrots and peas, and enamame. My oldest loves the organic mix from TJs-corn, carrots, peas, beans. I focus on fruits, and just let the veggies go. I've stopped caring. If they want to go to bed hungry, fine. If they don't want veggies, fine.
By wanting them to eat certain things, you create a power struggle. The more you care, the more they stand firm. Unless they have some sensory issues, food is a power struggle in your house. It's the only thing I can think of as to why kids won't eat fruit. Fruit is pure sugar! How about blueberry pancakes? They don't even eat them?
Muffins. I make zucchini oatmeal muffins that my kids love. Have you tried something like that? They also love blueberry........but who doesn't :-)
Try to involve them in the process of picking out and making food. It does make a difference.