Toddler will not eat healthy foods [View all]

My 18 mo son will absolutely not eat healthy foods. Fruits, veggies, unless it's apples it's a no go. I'm ripping my hair out. With veggies I've presented them to him a million different ways, sauteed, steamed, with and without herbs and spices, and it all ends up on the floor and with my son screaming like I gave him pure toxic waste. Meanwhile fruits aren't faring much better with him shoving a piece in his mouth, holding it there for a second before spitting it out and going to the next one to repeat the process. He'll eat apples and dehydrated fruit mix from a bag, but those are expensive and apples can't be the only healthy thing he'll eat! I'm at a loss. How do I fix my picky eater?