My sons a very picky eater before kids I said I refused to have a picky eater(lmao)

Anyways he eats toast and grilled,cheese, pancakes, French toast, lasagna, shepherds pie, cabbage rolls all fine with no problem. (cut up into bite size pieces) When it comes to fruit and veggies he refuses to eat gags till he pukes . I get fruit in by mixing it with yoghurt or cottage cheese but still he needs variety! he’s a big boy now and should eat all those yummy things kinda just frustrated any tips on how to get those foods in!