Sprinkle the gelatin over the cold water to soften for about 5 minutes; add the boiling water and stir until the gelatin dissolves. Stir in the tomato sauce, lemon juice, Worcestershire sauce, salt and pepper. Cool.
Add the sour cream and beat until combined. Chill un-til slightly thickened and fold in the remaining ingre-dients.
Pour into six individual molds and serve on crisp salad greens garnished with sliced cucumbers and lemon wedges.