One way to get some picky eaters to try new foods is to involve them in the kitchen. Bring them in and have them touch vegetables and break them up to make different recipes. Expect your kitchen to get a little messy. But the results can be well worth the added effort.
I know that sometimes, especially after a long day at work, it may be easier to just buy it or do-it-yourself. But the fun of making a new dish can be something your little one will want to do. Actually creating it by helping wash the veggies or fruits and put them in the bowl, can be a great way for your child to begin to form a new impression of that food in their mind.
If we want to change our child's habits, we have to create new ideas and perceptions. It is what marketers do all the time. We need to look at those little cute faces as our "marketing customers". And we give them reasons to try our "brands" (aka veggies and other healthy foods or activities).
I call it marketing a healthier child. Parents, hopefully, you will have fun too and create some great family memories.