I always hide veggies in food. Ds3 would only eat black eyes peas for the longest time. When he was turning 5 I told him since he was a big boy he had to try two new veggies each year. Now he eats green beans or corn (about 3-4 bites) but that's it.
I grate zucchini, squash and carrots into most spaghetti/marina type sauces and no one knows. I make chicken broth by boiling chicken breast with onion, celery and carrots, then make a purée out of the veggies to add to gravy.
I don't have much help other than "forcing" them to take at least 1 bite of it and always putting it on their plates. My kids know that they have to try 1 bite before leaving the table. They have to eat 3-4 to get dessert.
I lift my eyes unto the hills, Where does my help come from? My help comes from the Lord, The Maker of Heaven and Earth. And I'll praise You in this storm and I will lift my hands, For You are who You are no matter where I am, And every tear I've cried You hold in Your hand, You never left my side and though my heart is torn, I will praise You in this storm