Nobody sticks to a diet. However, everyone sticks to habits — provided they require less effort than the alternative. Eating better isn't a matter of willpower: it’s a matter of organising your week and what’s within arm’s reach on a Tuesday night at 7 p.m.

One hour on Sunday determines the quality of the next five dinners.

The moment of decision isn't during the meal

Most bad dinners aren't chosen: they're endured. You get home late, nothing is ready, and the fastest solution wins. The decision wasn't made at 7 p.m. — it was made on Saturday, the moment you didn't buy anything.

That is good news, because it shifts the problem to a time when you are available and clear-headed. A grocery list built around five dinners is five decisions made in advance, all at once, with a cool head.

Willpower is a resource that depletes throughout the day. Organisation does not.

One hour on Sunday

The principle is not to cook five meals in advance — that gets boring within two weeks. It's about preparing components that can be recombined differently each evening.

What to prepare on Sunday

A grain Brown rice, bulgur, or lentils, cooked in large quantities. The base for three dinners.
A tray of roasted vegetables Root vegetables and squash, chopped into large pieces, done in one batch. They can be eaten hot, cold, in a salad, or blended into soup.
A protein Seared chicken, spiced chickpeas, or hard-boiled eggs. To be sliced at the last minute.
A sauce Yogurt-lemon-garlic or tahini-water-lemon juice. This is what changes the identity of the dish from one night to the next.
Something fresh Washed herbs, red onion pickled in vinegar, toasted seeds. The contrast that prevents boredom.

Five components, one hour, and five dinners that don't look the same. On Tuesday night, assembly takes six minutes — less time than a delivery.

The same components, two different evenings.

Three habits that last

Add before subtracting. Starting by adding a vegetable to every meal works better than starting by removing something. Substitution then happens naturally.
Eat sitting down, without a screen. Satiety takes about twenty minutes to set in. A meal rushed through in eight minutes in front of a screen doesn't allow for that time to pass.
Keep one exception per week. A framework that admits no exceptions won't survive a rough evening. One that plans for an exception will survive the year.

Cooking more often, the only variable that matters

All studies on diet agree on one simple point that is rarely highlighted: what most clearly distinguishes dietary patterns is not a particular food, but the proportion of meals prepared at home. A home-cooked meal almost always contains less salt, less sugar, and more vegetables than its industrial equivalent — without any conscious effort being made.

Which means the question isn't “What should I eat?” but “What is stopping me from cooking tonight?” Often, the answer is practical: a cluttered workspace, a sticky pan, ten minutes of dishes at the mere thought of starting. These are the frictions that must be removed first.

The best meal of the week is the one you actually wanted to make.

House tips

Do your grocery shopping after you've eaten. It is the most mundane and effective piece of advice on this list.
Keep healthy food at eye level. What you see when you open the refrigerator is what you eat.
Cook in double batches. The marginal cost of a second portion is close to zero; that of a second dinner is not.
Clean as you cook. A clean kitchen by the time you sit down to eat removes the main reason not to do it again tomorrow.