Here is a simple Jain-approved list:

Generally allowed vegetables

• Bottle gourd
• Ridge gourd
• Sponge gourd
• Pumpkin
• Cucumber
• Zucchini
• Tomato
• Capsicum
• Brinjal / eggplant
• Ladyfinger / okra
• Beans
• Peas
• Corn
• Leafy greens like spinach, lettuce, fenugreek leaves, coriander, mint
• Cabbage
• Cauliflower
• Broccoli

Generally avoided vegetables

• Root vegetables:

- Potato - Onion - Garlic - Carrot - Radish - Beetroot - Turnip - Sweet potato - Ginger

• Bulb and tuber vegetables
• Sometimes mushrooms are also avoided

Important Jain rule

• Avoid vegetables that grow underground, because they involve more harm to living beings.
• Also avoid onion, garlic, and all root vegetables in standard Jain food practice.

Note

• Some Jain traditions follow stricter or slightly different food rules, especially during Paryushan, Ayambil, or other vows.

If you want, I can also make this into a very short “eat / avoid” chart.