Eat a full lunch, because lunch serves as a link between the past and the future, replenishing the energy consumed in the morning and preparing for work and study in the afternoon. So you can’t just eat box lunches or fast food for lunch. There should be rice, meat, vegetables, soup, and then a piece of fruit after half an hour. Here are some set menu recipes for you. Stir-fried shredded beef with carrots + fried cauliflower and tomatoes + winter melon, winter bamboo shoots and mushroom soup + rice. Lotus root, pork and mushroom soup + potato spicy + shredded chicken and broccoli + rice. Seaweed, tofu and winter melon soup + fried mutton with green onion + oil-consuming lettuce + rice. Onion, ginger and tofu soup + winter bamboo shoots and chicken slices + stir-fried celery + rice. Boil hairtail + mushrooms, rapeseed + tomato and egg soup + rice. Stewed pork ribs with lotus root + pan-fried shrimp with green onion + vegetarian stir-fried cabbage + rice. I have made all of these, they are delicious and nutritious. There are many more. Let me write a few for your reference.