L.D.
At 14 months, my children ate everything. They loved the independence and novelty of eating on their own. Anything we ate, I cut up in small pieces and gave to them. I bought those bags of frozen mixed vegatables (peas, corn, carrots, greenbeens) and would microwave them an then put them on the high chair. That kept my kids busy for 30 minutes - picking up those little things and putting them in their mouths.
My children gagged on the stage three food when I first introduced it, but once they got the hang of it, they were good to go.
I think that you should continue to offer a wide variety of foods and praise him if he tries them. Also let him see you eating the food and enjoying it.
We used to go to Whole Foods or Central Market and walk around and try all the samples. My kids LOVED that. Before we left, I would make up a little plate from the salad bar of all kinds of different foods - edamame, garbonza beans, fruit, beans, grains - I would try to get different food from what we normally ate at home and then I would give my babies a little on their trays for the next day or two.
All you can do is continue to offer the food - you cant cram it down the kids throat or get mad and yell at him if he doesnt eat it. You are right, he will eat when he is ready.