Margarita Cheese Cake

Description
This is a recipe I obtained from an Estate sale. I obtained it when I purchased the family collection from the Tinsley Estate in Venus, Texas in 1987.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1½ pounds cream cheese
 * 3 whole eggs
 * 1 cup sugar
 * 2 ounces lime juice
 * 1½ teaspoons rum extract
 * 2½ cups salted pretzels crushed
 * ½ cup sugar
 * 2½ ounces butter, melted
 * 3 cups whipping cream
 * 2 teaspoons lemon and lime zest

Directions

 * 1) Combine pretzels, sugar and butter in pan then press to make crust and take it up the sides of a spring form pan.
 * 2) Mix cream cheese on low speed until softened then add remaining ingredients except eggs.
 * 3) Mix slightly then add eggs one a time blending until mixed.
 * 4) Put a water bath with very hot water on the shelf beneath the cheesecake and bake for one hour at 300°F.
 * 5) When cool loosen sides of cake from pan then remove sides of pan.
 * 6) Combine lemon and lime zest and fold into whipped cream.
 * 7) Place topping on top of cheesecake.
 * 8) Garnish with extra zest and sprinkle on top of cream.