Answer

Yes, generally bananas are allowed in Ekasana for a Shwetambar Murtipujak Jain, if they are taken during your one sitting only and if they are acceptable according to your family/guru’s Ekasana rules.

Explanation

In Ekasana, the main rule is:

• You eat only once in one sitting.
• You should not get up and eat again later.
• Food should be Jain-appropriate and within the rules you have taken.

A banana is not a root vegetable, so it is generally not prohibited like potato, onion, garlic, etc. Many Shwetambar Murtipujak Jains do take fruits like banana in Ekasana, depending on their local/family practice.

However, some people follow stricter rules in tapasya, such as avoiding certain fruits, green items, or foods not prepared in a certain way. So if your guru, family, or sangh has given a specific rule, follow that.

Takeaway

You can eat banana during your Ekasana sitting, unless your specific vow or family/guru tradition says not to. If unsure, ask your elder or guru, but from a general Jain Ekasana perspective, banana is usually acceptable.