Cook Discovers He Has Been Paying for Water He Already Owned

Consider the inputs you discard on a normal week: onion ends, the green tops and woody bottoms of carrots, celery you bought for one recipe, parsley stems, a parmesan rind, the carcass of a roast chicken. You pay for these, cook around them, and then move them — at some expense of effort — into the bin. Then, on a later trip, you buy stock in a box to replace exactly what you threw out.

The system

Keep a bag in the freezer. Every scrap above goes in it as you cook. Bones too. When the bag is full, you have the raw material for stock and you have spent nothing additional to get it.

• Inputs: the freezer scrap bag (vegetable trim + bones/rinds).
• Process: cover with cold water, bring to a bare simmer, hold 45–90 minutes (longer for bones), strain. Do not boil hard — it emulsifies fat and clouds the result.
• Output: 2–3 litres of stock that is the base of soup, risotto, braises, and the next pot of rice. One full bag routinely seeds three to four meals.

Rules

• Scraps go in raw and frozen; you are stockpiling inventory, not spoilage.
• Salt at the end, or not at all — you season the dish, not the base.
• A chicken carcass is not the end of the chicken. It is the start of the soup.

You were going to throw the materials away and then buy them back. Stock is just the step where you decline to do that.