H.G.
I have the same thing with my 21 month old. Lately I've been letting him "help" me. It works about 50% of the time so far. If he gets to stir something it makes it super tasty! (in his mind!) The boy can't eat PB&J forever! He's a big snacker. He loves fruit and eats healthy snacks I just can't get him to eat real meal with me at night most of the time. I have him taking Lil critters gummi vitamins and Rhino Fruit/Veggie bears to supplement his diet since he likes and dislikes vary from day to day. The dr told me that he won't let himself starve and he'll eat when he's hungry. See if letting him help out might make things taste better!
~H.