In the bowl of an electric mixer fitted with the whisk attachment, mix together sour cream, mayonnaise, and cream cheese until well combined. With the mixer on low, add hearts of palm, parsley, cheese, salt, pepper, and hot sauce; mix until well combined. Fold in 3/4 cup of the cooled spinach and artichoke mixture, reserving any remaining for another use. Transfer dip to refrigerator until chilled about 2 hours and up to two weeks; serve with crudite, flatbreads, or baguette slices.