preheat the oven to 350°. Set out two baking sheets. Stir together the oats, both sugars, flour and salt in a large bowl. Make a well in the center and stir in the butter, egg, and vanilla. Stir in the chocolate chips, mixing until well mixed.
Drop teaspoons of the dough 3 inches apart onto the baking sheets. Bake until lightly browned, 8 to 10 minutes. Let cool on the baking sheets until the cookies firm slightly, about five minutes. Transfer to wire racks and let cool completely. Makes about 30 cookies