Wasabi mayo is a great topping for salmon, tuna, and other fish, a nice binder for tuna or potato salad, a tasty dipping sauce for baked “fries,” and a nice drizzle for our Grilled Asparagus with Lemon Zest.
Mix the wasabi powder and 1½ tablespoons of water together in a small bowl until it forms a firm paste. (If it’s too dry, add a little more water.) Mix the wasabi paste and the mayo in a small bowl until fully blended. Add more of the wasabi mixture if you like it spicier, but note that wasabi takes 5 to 10 minutes to “activate”—so wait and taste-test before adding more.