Solidify Leftover Sauce

How cunning is this? I detest squandering sustenance yet at times its tricky to avert, particularly when a formula calls for a large portion of a mug, yet the jars are sold in 16 ounce servings (like tomato glue). Basically you could do this with custom made sauces and also anything canned that you don't use up like refried beans, hacked jalapeños, and so forth..............