1. In a pot of boiling, salted water cook pasta as per packet directions.
  2. Dice sweet potato into 1 cm cubes and place in a bowl with a small amount of water. Cook in microwave on high until soft.
  3. Once pasta and sweet potato are cooked, add to a fry pan with the pesto and cook on medium heat. Stir for 1-2 minutes and add sage.
  4. Cook for a further 5-8 minutes, stirring occasionally.
  5. Divide into serving bowls and top with grated cheese if desired.
  6. Serve and enjoy with family and friends.