Have a look online. You could start experimenting with different spices so a tomato sauce one night is Mexican, the next it’s Italian and then Indian.
There are plenty of ideas out there, and if you can get the kids involved working out what they could make from tins and dried food, even better! It’s an opportunity to teach the kids some cookery skills and they may even pick up some ideas on nutrition. Kids are resilient and often willing to see things from different perspectives if you can also make it fun and tasty.
Try one of the apps that help you to cook with what you have, (see brit.co/recipe-apps-for-ingredients-you-already-have). Also try supercook.com where you select which ingredients you have and they’ll start you off with a load of recipes. It then suggests more specific ingredients to give you more options. The suggestions are great because you probably have more ingredients than you thought and there are some great meals in your pantry just waiting to get out.