Mango-Cajeta Angel Food Cake

3/4 cup milk
2 cups cajeta or caramel sauce
1/4 cup sweetened condensed milk
1/2 cup chopped walnuts
1 prepared angel food cake
2 cups diced mango

Bring the milk to a boil in a large saucepan. Add the cajeta, condensed milk and walnuts, stirring until well mixed. Remove from heat. Slice the angel food cake and place on dessert plates. Spoon the sauce over the cake, and top with the mangoes.