I have a couple of sauce / soup basics that can be added to.
Chopped onion -fresh or frozen
Chopped tomatoes - fresh or tinned
garlic, one clove or paste or 1/2 a cube of frozen
teaspoon of dried oregano
salt and pepper
This is my basic 'Italian style' sauce you can add pasta, or chicken or break up some mozzarella or add rated cheese, tinned or soaked chickpeas or mince.
I have a basic Asian soup
1 veg stock cube
boiling water
crushed garlic, fresh, frozen or pure.
Crushed ginger, again fresh or frozen
You can pour this over rice, or add broccoli, chicken, chili, sweet corn.
A couple of spoons of cream cheese and a couple of spoonfulls of the water you cook pasta in makes a great creamy pasta sauce, you can add cheese, meat, veg, whatever you have to hand.
Beans on toast, add a bit of bacon if you have any.
Cheese on toast.
Also call your credit card companies and tell them you cannot afford to pay.