In a large bowl, stir tuna, scallions, egg, seasonings and bread crumbs together. Mixture should be thick and hold together when formed into patties. If they do not, add in more bread crumbs until they hold together. Form into 6 even patties about 3/4 inch thick.
In a large skillet, melt cubes of Lemon Pepper Saute Express Saute Starter over medium heat. Swirl pan to coat evenly. Place patties into hot pan and cook 4 minutes per side or until brown. Remove from pan and set aside.
For the tartar sauce, stir all ingredients together in a small bowl.
To assemble sliders, place lettuce and slice of tomato onto bottom half of each roll. Top with tuna burger and tartar sauce. Serve immediately.