1 large, stemmed portobello mushroom cap
1 teaspoon Kikkoman Soy Sauce
1/2 teaspoon balsamic vinegar
1 whole-grain hamburger bun
Gruyere cheese
caramelized onions
Umami Secret Sauce (recipe below)
Grill mushroom cap 3 to 4 minutes on each side or until tender and nicely grill-marked. Brush with soy sauce and vinegar; grill 1 minute longer on each side. Serve on griddled hamburger bun with melted Gruyere cheese, caramelized onions and Umami Secret Sauce
To make Umami Secret Sauce: Mix 4 cups mayonnaise, 1/2 cup Kikkoman Soy Sauce and 1/4 cup Dijon mustard. (Yield: 4 3/4 cups)
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Even people who love soy sauce and use it all the time are often surprised to learn what it is and how it’s made. We make ours from just four simple ingredients—water, soybeans, wheat, and salt. Those ingredients are transformed through a traditional brewing process—much like making wine or beer—that has remained unchanged for centuries.
READ THE STORY OF SOY SAUCE
