"It’s important to maintain a diverse and nutrient-rich diet even when you are in remission and your symptoms have subsided, or even disappeared. Introduce new foods slowly. Remember to stay hydrated with water, broth, tomato juice, and rehydration solutions. Consult with your doctor or dietitian before making any changes to your diet.

These foods can help you stay healthy and hydrated:

• Fiber-rich foods: oat bran, beans, barley, nuts, and whole grains, unless you have an ostomy, intestinal narrowing, or if your doctor advises you to continue a low-fiber diet due to strictures, or recent surgery

• Protein: lean meats, fish, eggs, nuts, and tofu

• Fruits and vegetables: try to eat as many “colors” as you can, and remove the peel and seeds if they bother you

• Calcium-rich foods: collard greens, yogurt, kefir, and milk (if you are lactose intolerant, choose lactose-free dairy products or use a lactase digestive enzyme)

• Food with probiotics: yogurt, kimchi, miso, sauerkraut, and tempeh"

References: 

1. https://www.crohnscolitisfoundation.org/diet-and-nutrition/what-should-i-eat