In medium bowl, beat together cream cheese, cottage cheese, sugar, orange peel and vanilla. Using all of mixture, spread an equal amount on each flour tortilla to within 1/2 inch of the edge. Preheat griddle over medium heat. Use a non-stick surface griddle or spray with non-stick vegetable spray. When griddle is hot, place tortillas filling-side-up on griddle and heat for 1 minute. Remove from griddle and quickly fold in half. Cover and keep warm while cooking remaining quesadillas. To serve, cut each quesadilla into thirds or quarters and top with 2 teaspoons apricot preserves.