Eating habits

Working with three toddlers every day, I notice a lot of differences in personality and preferences. The one that struck me today was their eating habits.

Addie is a meat eater. She will smash and destroy other items (usually fruit) that appear on her plate, but she will devour any meat and always ask for more.

Jake is a carb kid. He would live on bread and fruit if we let him. I always make sure he eats SOME meat, but he rarely takes more than 2 or 3 bites and then asks for more fruit. Or bread.

Olivia will eat almost anything, especially if she can dip it in ketchup (or other "dippers", like syrup or sour cream).

So, with three very different eating personalities, what do you feed these kids to keep them all happy?

No, really, I'm asking. I need more ideas. Because the best option I've come up with so far is cheese pizza, which they will all eat (and, I think, is defined by any good dictionary as the "universally accepted kid food"). And as much as we all like cheese pizza, I tend to think that they need more variety than that.