This is a very thoughtful question that took me back to the time we were new parents.
Discussing this with my partner to see if there were dishes that we thought befit the hot Australian summer when we had the baby.. And we honestly couldn't think of any!
Everything was a blur; opening the fridge and finding something—anything—to eat was already the best feeling in the world.
We were quite lucky to have a multicultural circle of friends/family. We think that variety is probably more important than what the food actually were. If all we had was lasagna, we would eat it every day for a week. But choosing between fried rice, chilli con carne, pasta, or curry from the fridge/freezer was one of the few highlights of our day.
If you're part of a group of friends, you can discuss among yourselves the different things you could bring. If not, imagine you just had the most exhausting day of your life. What do you wish you would find in your fridge right about now?