Preheat oven to 300 degrees. Combine butter, crumbs and sugar. Pat firmly in bottom of buttered 9-inch spring-form pan. In large mixing bowl beat cheese until fluffy. Beat in Eagle Brand, eggs and salt until smooth. Stir in Amaretto. Pour into prepared pan. Bake 50 to 55 minutes or until cake springs back when lightly touched. Cool to room temperature. Chill. Garnish as desired. Refrigerate leftovers.