Blend margarine and sugar at medium speed. Add cream cheese and mix until smooth. Add one egg and mix thoroughly on low speed. Add vanilla. Dissolve gelatin in wrm water and add to mixture. Divide mixture into two equal parts. In first part, blend creme de Menthe and green food coloring. In second part blend peppermint extract and red food coloring. Fold whipped cream into both mixtures. Form crust in 9-inch pan by placing Thin Mints side by side. Spread green mixture on top of cookie and smooth. Crush remaining cookies and cover green layer. Spread red mixture over this and place in refrigerator to set. Top with more whipped cream before serving.