Cranberry-Waldorf Gelatin Salad

Ingredients for 8 servings: 

2 (3-oz.) packages cranberry-flavored gelatin
1 3/4 cups boiling water
3/4 cup cold water
3/4 cup diced Red Delicious apple
31/4 cup diced Golden Delicious apple
1/2 cup seedless green grapes, quartered
1/4 cup finely chopped pecans 
cooking spray
11/2 (8-oz.) block cream cheese, softened
3/4 cup  sour cream
2 Tbs. sugar
1/4 tsp. vanilla extract
lettuce leaves
apple slices (optional)
chopped pecans (optional)  

Combine gelatin and boiling water in a bowl; stir until gelatin dissolves. 
Stir in cold water. Cover and chill 1-1/2 hours or until the consistency of unbeaten egg white. 
Fold in apples, grapes, and pecans.
Spoon into a 5-cup gelatin mold coated with cooking spray. Chill until firm.
Beat cream cheese at medium speed of a mixer until smooth. 
Add sour cream, sugar, and vanilla; beat well. 
Invert mold onto a serving plate; cut into 6 pieces. 
Serve on lettuce-lined plates; top with 2 tablespoons cream cheese mixture. 
Garnish with apple slices and chopped pecans, if desired.