Mix Jell-O, pineapple; drain the juice, using only pineapple itself. Stir until well mixed, then add cottage cheese. Stir until well mixed, then add Cool Whip and half of the can of sliced Mandarins. Then garnish with the rest of the Mandarin slices. Place in refrigerator for about 2 hours before serving.
Cajun Country -- New Iberia, Louisiana