Salsas I would freeze. Pate and meat pastes freeze. Sauces in fridge , at least a year. Quince paste 18 months and still ok. Jams in sterile jars in pantry at least 2 years. Tapanades in freezer, Xmas puds, vacuum sealed in fridge a year. When in doubt freeze. It is worth having a variety of sizes in containers so that fillings are full in containers. No air. Very little waste here.