For a charcoal grill, place salmon on greased rack of an uncovered grilldirectly over medium coals. Place asparagus on grill next to salmon. Grill for 8 to 12 minutes or until asparagus is tender and fish flakes easily, turning fish once halfway through grilling, and turning asparagus occasionally. (For a gas grill, preheat grill. Reduce heat to medium. Place fish and asparagus on grill rack. Cover and grill as above.)
To serve, arrange asparagus on plates. Top each with salmon. Spoon Garden Mayonnaise mixture on top of salmon. Makes 4 servings.
In a small bowl combine celery, green onions, mayonnaise, lemon juice, and tarragon. Makes 3/4 cup.