Heat oven to 375°F. Lightly grease cookie sheets with shortening or cooking spray. Place flour in medium bowl. With pastry blender or fork, cut in butter until mixture resembles coarse crumbs.
Stir in cheese, sunflower nuts, Worcestershire sauce. Sprinkle with water, 1 tablespoon at a time, while tossing and mixing lightly with fork until dough is just moist enough to form a ball when lightly pressed together.
On lightly floured work surface, roll dough with rolling pin to 1/8-inch thickness. With lightly floured 2-inch Christmas cookie cutters, cut dough into desired shapes; place 1 inch apart on cookie sheets.
Bake 8 to 10 minutes or until golden brown. Immediately remove from cookie sheets. Serve warm or cool.