04To serve: place a burger onto a bun. Top with a slice of tomato and some Wasabi Mayo. Cover with the bun top and serve.05For mini-burgers: Prepare the buns by cutting out smaller buns with a 1 1/2-inch diameter ring mold or biscuit cutter. Take a heaping tablespoon of the burger mixture and form it into a small patty. Continue with the remaining mixture until all the burgers are formed. Grill them over medium heat until browned and cooked through, about 3 to 4 minutes per side. Place a shrimp burger onto a mini-bun. Top with a slice of cherry tomato and some Wasabi Mayo. Cover with the bun top and secure them with a toothpick.