Preheat oven to 325F. Combine cheese, 1/2 cup butter & flour. Mix thoroughly and chill, covered, 1 hour. Divide into 24 small balls and press into sides and bottom of 2 ungreased miniature muffin pans. Combine egg, brown sugar, vanilla, salt & remaining 1 tablespoon butter; beat until smooth. Sprinkle 1/3 cup pecans equally into 24 tart shells. Divide egg mixture equally among 24 tarts, pouring on top of pecans. Sprinkle remaining 1/3 cup pecans on top of tarts. Bake 20-25 minutes until pastry is golden brown.