The term "healthy" is obviously pretty meaningless, but I would not say that meatballs, mashed potato and brown sauce is healthier than pizza or steak or something.
It matters. Pizza has a huge amount of cheese and with burgers you have 'fries' which are deep fried. Meatballs and potatoes with veg are a bit more healthy. It's also the other things: Ketchup is full of sugar etc.