To toast the pecans, lay them on a rimmed skillet and bake at 350 to 375 degrees F. for about 10 minutes. If using small pecan halves, 350 is best. If using large ones (like from a pecan store), 375. After the first 7 minutes, stir the pecans around and check to see if they are releasing their oils. Smaller pecans may be toasted in just 7 minutes, while larger pecan halves may take up to 12. If desired, toss the toasted pecans in a little salted butter and let cool.