Jain diet is strict vegetarian and follows the principle of ahimsa (non-violence).

In general, Jains avoid:

• Meat, fish, and eggs
• Root vegetables like potato, onion, garlic, carrot, beetroot, radish, etc., because uprooting them harms many small living beings and the plant
• Honey, in many Jain traditions
• Food prepared in ways that involve violence or harm to living beings

Jain food is usually based on:

• Grains
• Pulses
• Fruits
• Leafy vegetables
• Milk and dairy products, if accepted in that family or tradition

Some Jains also avoid eating after sunset and follow additional fasting and dietary disciplines.

If you want, I can also explain the difference between Jain food rules in Digambar and Shwetambar traditions.