I'm not going to make my kids 19 and 12 eat foods they don't like even when other people cook them
Do they not like those foods?
No it's not, I want them to eat the way I like them to choose their foods.
It's your responsibility to make sure your kids eat right. Don't you think you're coddling them a bit?
My kids will eat the way I need them to, I decide what they need and when they need it. They will learn to eat wrong when they are not with me.
Your kids won't be with you forever. They're already old enough to go out with friends and find their own things to eat. Restricting what they eat will only make them want to rebel against you and eat poorly when you're not around.