Yes, you can eat a Jain samosa if it is prepared according to Jain dietary principles.

A Jain samosa should generally be made without:

• Potato
• Onion
• Garlic
• Root vegetables
• Eggs or meat

It may be filled with Jain-friendly ingredients such as peas, raw banana, cabbage, lentils, or other non-root vegetables, depending on the tradition followed.

If you are observing strict Jain food discipline, also check that:

• It was prepared before sunset
• The oil is fresh and vegetarian
• No onion, garlic, or root vegetables were used
• It was not cooked with non-Jain food

Takeaway: You can eat it if it is truly prepared as Jain food.