An easy DIY instead of buying frozen is Pizza Bagel Bites. It also easy enough that kids can do most of the process. Slice the bagels in half and arrange on a baking sheet. Top with pizza sauce, toppings and cheese. Bake in a 400 degree oven for about 7 minutes.
I make a batch of these and store in the freezer for lunches.
I have started making a lot of my own meals at home because I don’t care for the taste of the preservatives in many of the store bought products.