1Heat oil in 12-inch skillet over medium-high heat. Sprinkle beef with 1/2 teaspoon lemon pepper seasoning salt. Cook beef in oil until brown on both sides. Place beef in 5- to 6-quart slow cooker. Mix 3 tablespoons lemon peel, the gingerroot and soy sauce in small bowl; spoon over beef.
2Cover and cook on Low heat setting 8 to 10 hours.
3Remove beef from cooker; cut across grain into thin slices. Mix mayonnaise, 1 tablespoon lemon peel and 1/2 teaspoon lemon pepper seasoning salt in small bowl. Serve beef with mayonnaise.