Frozen Raspberry Dessert

1/2 cup finely chopped blanched almonds or macadamia nuts

1/4 cup butter or margarine, melted

1 can (14 oz) sweetened condensed milk (not evaporated)

3 tablespoons lemon juice

3 tablespoons orange-flavored liqueur or orange juice

1 package (10 oz) frozen raspberries with syrup, thawed

1 cup whipping cream, whipped

2 drops red food color Sweetened whipped cream, if desired

Chocolate hearts, if desired (see below)