In bowl, combine 1 Tbsp (15 mL) olive oil, sweet potato, 2 to 3 thyme sprigs, 1 rosemary sprig, and half of each of the salt and pepper. Pour onto baking sheet and bake for 10 minutes. Allow to cool for about 5 minutes and scrape into bowl. Discard stems of herb sprigs, running your fingers along the sprig and adding leaves to bowl.