Line a 9 x 5-inch loaf pan with plastic wrap; coat plastic with cooking spray.
Place 1 1/4 cups sugar, fruit concentrate or puree, applesauce, and corn syrup in a saucepan; bring to a boil. Cook until a thermometer registers 224 (about 10 minutes).
Add pectin; bring to a boil. Cook 1 minute, stirring frequently.
Remove from heat. Stir in lemon juice.
Pour mixture into prepared pan; cool. Cover; let stand at room temperature overnight.
Sprinkle top evenly with 1 tablespoon sugar. Invert gele onto a cutting board. Discard plastic.
Cut into 32 pieces.
Place remaining 3 tablespoons sugar in a shallow dish; gently roll geles in sugar.
