Make teriyaki glaze by mixing brown sugar, soy sauce, gingerroot, garlic and pepper flakes in 8-inch nonstick skillet. Stir over medium heat until sugar is melted. In small bowl, beat cornstarch and water; add to soy mixture. Cook 1 to 2 minutes, stirring occasionally, until mixture starts to simmer and has thickened. Cool slightly; reserve 2 tablespoons glaze in small bowl; cover and refrigerate.