Place all ingredients in a small saucepan over medium heat
Bring to a simmer, then reduce heat, stirring occasionally, until thickened to desired consistency
Allow to cool, then store in refrigerator, in a small jar or bottle
Notes
Although this recipe has not been lab tested, a single serving should be low-FODMAP based on the ingredients (using available FODMAP data at time of posting)
Select gluten-free soy sauce if necessary
Mirin is a Japanese rice wine that is sweetened. Select a brand without high fructose corn syrup
The recipe yields 6 ounces, 12 servings. About 1 tablespoon per serving
If you are having trouble with the sauce thickening, you may remove 1/4 cup and add 2 tablespoons of cornstarch to it. Stir this well and create a ‘slurry’. Return the cornstarch mixture to the sauce and stir to thicken