How to Make It
Thaw the orange and grapefruit sections. Drain and reserve juice. Prepare the gelatin according to package directions, using reserved juice to replace part of the water. Add the rosemary and orange and grapefruit sections and mix. Pour into a lightly greased (with cooking spray) 1 1/2-quart ring mold and chill until set, 4 hours.
Place crabmeat in a mixing bowl. Gently stir in onion, parsley, hot sauce, mayonnaise, Dijon mustard and celery.
Unmold the gelatin ring on a serving plate and fill center with crab mixture. Garnish base of mold with salad greens, if desired.