Preheat oven to 350 F. Combine flour, oats, soda, cinnamon & salt; set aside. Cream butter; gradually add sugars, beating until light & fluffy. Add egg & vanilla; mix well. Alternate additions of dry ingredients & pumpkin, mixing well after each addition. Stir in morsels. Bake at 350 F. for 20-25 minutes, until cookies are firm and lightly browned. Remove from cookie sheets; cool on racks. Note: dough may be frozen in air-tight container. Thaw in refrigerator; bake as directed.