1 (14 oz.) can sweetened condensed milk
1/4 c. lemon juice
1 (13 oz.) can crushed pineapple in heavy syrup, well drained
1 c. chopped pecans
1 (9 oz.) container whipped topping

Stir milk and lemon juice until well mixed. Add pineapple and pecans. Fold in prepared topping. Spread in vanilla wafer or graham cracker crust. Garnish with cherries or coconut and chill thoroughly.