Preheat oven to 375 degrees F. (if oven runs hot, use 350).**
Stir together flour, baking soda and salt. Set aside.
Cream butter and both sugars using high speed of an electric mixer, scraping sides of bowl often. Add egg and vanilla and beat for 30 seconds. Add flour mixture and stir until absorbed, then stir in oats, sunflower seeds and butterscotch chips.
Drop by generously rounded teaspoonfuls (3/4 inch mound) onto ungreased cookie sheets. Alternatively, you can use a medium size cookie scoop for bigger cookies.
Flatten tops slightly and bake for 12 minutes or until golden brown around edges.