How to get enough fruits and veggies after weightloss surgery? The best diet for someone who has had a gastric sleeve is one that consists primarily of vegetables. Despite the fact that vegetables are useful, people do not eat them every day. The nutritionist calculates the serving sizes and compiles a list of diets that will be most effective for you. If you eat a lot of vegetables after having a gastric sleeve, you can get to your ideal weight. For the first three months following surgery, pureed vitamin-rich foods should be consumed in addition to milk, buttermilk, and broth. After being boiled in water and mashed in a blender, broccoli, Brussels sprouts, carrots, spinach, artichokes, and celery should be prepared. Three months after the surgery, the restraints were removed.