Place a small skillet over medium-high heat until hot; add sesame seeds, and cook, stirring constantly, 3 minutes or until seeds are toasted. Set aside.
Drain crabmeat, removing any bits of shell; set aside.
Snap off tough ends of asparagus; remove scales with a vegetable peeler, if desired. Cook asparagus in boiling water to cover 5 mintues or until crisp-tender; drain. Plunge into ice water to stop the cooking process; drain and pat dry.
Arrange lettuce on 6 serving plates; top evenly with asparagus and crabmeat. Drizzle evenly with Asian Vinaigrette, and sprinkle with sesame seeds.