What does building a meal on one tray make easier?

Building a meal on one tray lowers the time spent at the stove and the number of pans at once. For vegetables, protein and grains to cook on the same tray the only condition is bringing their cooking times close together: the firm ones go onto the tray first, the quick-cooking ones are added later.

What can go on the same tray?

Everything going onto the tray has to withstand the same heat; so the choice is really made by hardiness. Root vegetables, zucchini, peppers, onions, chickpeas, pieces of chicken and fish fillet sit comfortably in this arrangement.

On the grain side there are two routes. Grains that want water, such as bulgur and rice, go onto the tray with their own water and covered; boiled grains or legumes are added to the hot tray later and only warm through there.

What does not suit is clear too. Leafy greens wilt on the tray, dairy separates, very finely chopped things dry out. These come together after the tray, on the plate.

How do you close the gap in cooking times?

The first route is the size of the chopping. Chopping something that cooks slowly small and something that cooks quickly large brings the two times closer; chopping potatoes small and zucchini large is the best-known example of this.

The second route is adding at different times. The firm ones go onto the tray first, the tray is taken out after a while, and the quick-cooking ones are added at that moment. That single movement makes two different cooking times possible on the same tray.

The third route is preparing beforehand. If dried legumes go onto the tray already boiled and root vegetables after being left in water for a while, the gap closes from the start. This step can be moved to a preparation day.

The fourth route is separating the ingredients within the tray. With the slow-cooking ones at one end of the tray and the quick-cooking ones at the other, the quick side can be taken out early if needed; this lets you use one tray as two separate zones.

Why should the tray not be crowded?

If the ingredients are packed tightly enough to touch, the steam that comes off stays between them and the tray starts to steam rather than to brown. The result is not burnt but a wet, loose tray.

The same happens with too much oil. Oil pooling at the base of the tray boils the underside of the ingredients rather than browning it; rubbing the oil onto the ingredients by hand or with a brush gives a more even result with less oil.

If it will not fit in a single layer, using two trays is better than filling one. If the oven is already on, a second tray has no extra cost either.

Which meals suit this arrangement?

Dinners suit it best, because while the tray is in the oven the table gets set and the salad gets made. The active time spent in the kitchen stays limited to preparing the tray.

The next day's lunch comes off the same tray too. Tray dishes do not fall apart as they cool and are suited to carrying in a container; setting part of it aside in the evening needs no separate preparation.

At a crowded table the tray makes the measure visible. Everyone taking from the same tray onto their own plate gives a more orderly spread than taking a share from a serving dish.

What can you do today?

Pick two of the vegetables sitting in the fridge, chop one small and one large, and put them on the same tray. Add a protein beside them; it can be chicken, fish or boiled chickpeas.

Do not fill the tray. Leave space between the ingredients, and rub the oil onto them rather than pouring it into the base. While the tray is in the oven, set the table and make the salad; by the time the tray comes out the meal is already built.