Party Pinwheels

10 large flour tortillas
2 boxes (8 oz. each) cream cheese, softened
1 cup black olives, finely chopped
2 Tbl. pimentos, finely chopped
1 pkg (dry) ranch dressing
1/2 lb. deli roast beef, shaved

Mix cream cheese, olives, pimentos and dressing until smooth. Spread evenly over the flour tortillas all the way to the edges. Add a thin layer of roast beef to within about 1/4" of the edges. Roll tightly securing with toothpicks if needed. Refrigerate at least 2 hrs, overnight is even better. Before serving, slice into pinwheels.