@MadDad92 the answer to your question "Why won't my 2 year old eat any fruit or veg?" may lie in the food he has been eating instead of eating fruit and veg if he has been given ultra processed artificially engineered food with extremely high palatability. Any snacks, sweet or savoury that has the perfect bliss combination of sugar, salt and fat to make it irresistible. Does he have crisps regularly ? or chips or nuggets or any food, frozen or not, out of a packet and factory? Was he weaned with pouches made with such strange combination of veg and fruit they taste like nothing in real life (who eats spinach and blueberries mashed together?) . Refined flour and grain, so white toast and white rice, breakfast cereal, all of which favour gut bacteria that influence the brain choices and so on.
Trying to hide a quarter of a zucchini makes little sense even in desperation. What you need to change is the other food that he eats and really abandon all ultra processed food which cultivates an artificial preference for crap, so instead of chicken nuggets (if he has them), make your own home made chicken finger, even your own fries because the majority of the frozen one have sugar in some form (maltodextrin, or some starch ) .
At the same time, you need to involve your son in the cooking process from A to Z, Go to supermarket with him and have him pick, the most beautiful zucchini, the darkest broccoli, the reddest tomatoe and so on. At home, put a chia against the sink and have him wash the veggies, then move the chair next to you and let him watch while you cut, slice, dress the veggies, have him mix the dressing, brush the zucchini slices before you put them in the oven and so on.
Learn to cook veggies that taste amazing, don't buy frozen, with the exception of peas, they taste horrible . At two, he can have his meals with the family, and everyone has the same food on the table. DOn't talk about the food, never say "see if you like it" because it implies that he might not like it.
But as important as offering is removing the food that inhibits his taste . If the only fruit he knows if the one in bars coated with sugar, he will never find any pleasure in real stuff.