In Jainism, ekasana means eating one meal in a day. If you have two ekasana, that is called biyasan (two meals in a day). It is not the same as a full Upavasa (complete fast) and does not equal “1 fast” in the strict sense. Ekasana is more stringent than typical daily eating but less than a full day of no food.

• Ekasana = one meal in a day.
• Biyasan (two ekasana) = two meals in a day.
• Upavasa = no solid food for a day (or longer, depending on the vow).

Traditions (Digambar vs. Shvetambar) differ in details, but the basic idea remains: ekasana is a single daily meal; two such meals constitute biyasan, not a complete fast. You can read more here and here