Further reading here : https://www.newyorker.com/magazine/2020/02/17/was-jeanne-calment-the-oldest-person-who-ever-lived-or-a-fraud

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I am talking about zucchinis, not dangerous stuff. You'll see quick enough if a recipe is not good or if you don't like it.

Make a weekly menu, pin it on the fridge and stick to it. Then buy only the ingredients needed.

The key of success is to be lucid and plan 1 or 2 lazy day, with pizzas or whatever, dishes that don't need any effort to make.

You'll save a ton in groceries, and will waste almost nothing. Bonus point : you can generate the menus with an AI.