Shake up the remnants of a bottle of ketchup with a splash of sprits, a heap of mayonnaise and a few other simple additions, and turn it into one of the culinary world’s most famous sauces My new favourite preparation for sauces, marinades and dressings is in a near-empty jar, tub or bottle, so I...
Source: [Guardian International](https://www.theguardian.com/food/2026/aug/26/how-to-turn-dregs-ketchup-into-classic-marie-rose-sauce-recipe-zero-waste-cooking)