If you hate waste, love apples, and think vinegar instantly improves store-bought barbecue sauce and gooey homemade chocolate chip cookies alike, making your own scrap vinegar is an absolute must.

Many home cooks know this and use these scraps to make apple cider vinegar or apple jelly. One more apple scrap recipe that belongs in your kitchen is the great agrodolce. Agrodolce is a thickened ...