I agree with the "you eat what's been made" and no special meals for children. Kids learn to eat whatever we provide, that is what they will prefer, that's why different cultures children prefer foods of their culture, because that's what they're used to.
Today in the USA we have a lot of eating disorders and strange food habits. I think some of this may be learned behavior, and begins in childhood. Not allowing children to recognize their physiological signals of hunger, and especially fullness, is not allowing them to learn good control of their diets. Children know when they've had enough. They clearly tell us. Insisting they clear their plates is, I think, detrimental and trains them to ignore full signals, leading to overeating in later life.
I see my job as a mom as to provide good healthy, home cooked meals. To provide a range of healthy foods and let my son eat, or not eat, whatever I provide. I don't buy junk food in the weekly shopping. So he can only eat healthy food. If he says he does not like a particular food I accept that is his personal taste and don't insist he eats it. This way his body will make sure he gets what he needs.
For ages of 5-7 I have relied on the "if you put it on your plate then you eat it" and let kids decide how much and what of whatever is on offer they eat. This allows them to control their diet and enforces decent table manners. No waste either!
So don't worry about balanced meals. Over time they will eat what they need. Just provide enough healthy food, and don't have junk (high fat, high salt, highly processed) food in the house.
I live by the rule that if it comes in packaging, has a long list of ingredients that I don't recognize as food, some of which may have numbers, then I don't buy it. So I tend to shop around the outside of the supermarket, fresh fruit and veges, meat, butter, bread. That's pretty much all I will buy. If you do that they're bound to be healthy!
If they don't appear to be eating enough, don't worry. Hunger is THE strongest human biological drive, basic survival stuff. They will not starve themselves (anorexia is another matter).
Oh, and I always gracefully accept my son's eating decisions, and insist he ask politely "may I please be excused from the table" when he's done.