Step 1

Sprinkle contents of 1 env. unflavored gelatine over 1/4 cup water in small bowl; let stand 1 min.

Step 2

Combine 1/4 cup granulated sugar and 2 Tbsp. cornstarch in medium saucepan. Gradually whisk in 1 cup orange juice, then dissolved unflavored gelatine until well blended. Bring to boil on medium heat; cook 5 min., stirring constantly. Remove from heat. Add dry strawberry gelatin mixes; stir 2 min. until completely dissolved. Pour into 9x5-inch loaf pan sprayed with cooking spray.

Step 3

Repeat with orange gelatin mixes, and remaining unflavored gelatine, water, granulated sugar, cornstarch and orange juice, pouring orange gelatin mixture into separate prepared loaf pan. Refrigerate gelatin mixture in both pans 4 hours or until firm.

Step 4

Unmold strawberry gelatin mixture onto cutting board; cut into 21 (1-inch) cubes. Repeat with orange gelatin mixture.

Step 5

Add decorating sugar to pie plate. Add gelatin cubes, a few at a time, to pie plate; turn to evenly coat all sides of each cube with sugar. Transfer each batch of gelatin cubes to plate before adding next batch of gelatin cubes.