Ingredients
1 tbsp. water
3 tbsp. white miso
1 1/2 tbsp. rice vinegar
1 1/2 tbsp. sugar
1 lb. zucchini or yellow (crookneck) squash, sliced 1/4 inch thick lengthwise
2 green onions, thinly sliced
Instructions
Whisk together the first 4 ingredients in a small bowl until well-combined.
In a large zip-top bag, combine squash, green onions, and sauce. Toss bag until squash slices are coated with sauce. Put bag in refrigerator, tossing hourly, for 4 hours.
Lightly oil grill and heat to medium. Lay squash slices on grill and brush with leftover sauce. Cook until browned on bottom, about 4 minutes. Turn over, brush with remaining leftover sauce, and cook for another 4 minutes (or until browned).