3 tablespoons orange juice
1 teaspoon grated orange peel
1 teaspoon grated lime peel
3 tablespoons rice vinegar
2 tablespoons mirin or dry sherry
¼ cup soy sauce
12 Portabella or other large mushrooms, thickly sliced
Combine first 6 ingredients in a small bowl.
Spray a cookie sheet with non-stick spray. Spread mushrooms on the cookie sheet and spray with more non-stick spray. Broil 3 minutes. Flip mushrooms over and broil another 3 minutes.
Toss mushrooms with dressing in a medium bowl. Chill 1 hour.