Prepare the Jar: Clean and sanitize the mason jar, lid, and ring.
Combine the Ingredients: In the mason jar, combine the mashed bananas, white balsamic vinegar, honey and chili peppers (if using). Stir gently to distribute the bananas evenly.
Initiate Infusion: Seal the jar tightly with the lid and ring. Shake the jar gently to encourage infusion.
Infusion Process: Store the jar in a cool, dark place, away from direct sunlight. Shake the jar gently once a day for 2-4 weeks, allowing the flavors to meld and intensify.
Straining and Bottling: After 2-4 weeks, taste the vinegar. When it has reached the desired level of flavor, strain the vinegar through a fine-mesh sieve into a clean bowl. Using a funnel, carefully pour the strained vinegar into storage bottles or jars.
Storage: Store the banana vinegar in a cool, dark place. Properly infused banana vinegar can last indefinitely without refrigeration.