I have used a 'fiery hot' pesto sauce from a glass jar over the last couple of days. It was so spicy that it was used over three days easily. The first eve I used Gnocci pasta dumplings with a tin of toms a couple of tablespoons of the sauce and then boil the gnocci for a couple of mins in the tom sauce.
second night I boiled parsnips, carrots pots and added cream and a couple of tablespoons of the sauce to make a casserole.
third night I added cooked chicken onion and pasta though you could use rice any of the casserole left from last night add water and sauce to make up a sauce over the pasta or rice.
It was very spicy so we used yoghurt for those who needed it cooled!