Summer Cold Meal Prep: A Science-Based Guide to Nutritious No-Cook Dishes

The guide recommends choosing proteins that are low in fat, tender in fiber and high in moisture, such as chicken breast, shrimp, salmon, tofu and soft-boiled eggs. It notes that animal fats from beef and lamb have high melting points and become waxy and dry when cooled, while low-fat proteins and unsaturated oils in fish like salmon remain palatable at room temperature or chilled. Boiling or marinating is preferred over frying to retain moisture.

For carbohydrates, buckwheat noodles, rice noodles, brown rice, multigrain rice and oats are suggested as good cold-eating options. Long-grain rice and wheat noodles are high in amylose, which forms a hard texture when cooled as starch molecules recrystallize and squeeze out water. Sushi rice avoids this problem because vinegar interferes with recrystallization and sugar retains moisture. The article also points out that cooling rice and noodles creates resistant starch, which digests more slowly and survives reheating below 120°C.

Vegetables like cucumber, tomato, bell pepper, lettuce, radish, celery, onion, purple cabbage, spinach and avocado can be eaten raw or cold. Slimy vegetables such as okra and yam are said to feel more slippery and smooth when chilled, while cooked vegetables like spinach, eggplant and broccoli absorb sauces well after refrigeration.

Because low temperatures weaken aroma and dull the perception of sweet and umami tastes, the guide advises using strong, persistent flavors: acids like vinegar and citrus, savory ingredients like soy sauce, fish sauce and miso, and aromatics including garlic, ginger, chili, peppercorn, mint and cilantro. It provides five base dressing formulas: a Sichuan sesame paste sauce, a Vietnamese fish-sauce dressing, a Japanese ponzu sauce, a Korean spicy sauce and a Chinese garlic-oil vinegar sauce. Most base sauces can be prepared in advance and stored in the refrigerator for a week, while fresh aromatics and citrus juice should be added just before eating.

For cooking methods, the guide ranks no-cook preparations first, followed by microwaving, sealed appliances such as pressure cookers and air fryers, blanching, quick stir-frying, and finally braising and oven-roasting. The least recommended methods are long simmering and oven baking because they release both heat and humidity into the room. It also suggests running an exhaust hood to remove moisture, cooking during the coolest hours of the day, and batch-cooking to reduce the total number of hot-cooking sessions per week.

On food safety, the article says cooked dishes should be refrigerated within two hours of cooking, especially in summer, and are best consumed within three to four days. It recommends dividing food into small portions, keeping raw and cooked ingredients separate, and avoiding mixing dressing into vegetables until serving to prevent them from wilting.