Fill a pot with salt water, add the sweet potato cubes, bring to a boil and cook until the sweet potatoes soften but not too much. Strain and set aside.
Make the sauce: In a medium bowl, mix soy sauce, vinegar, tahini, peanut butter, sesame oil, sriracha, and agave. If the mixture is too thick add a little water and mix. Set aside.
Heat a tablespoon of oil in a wok, add crushed garlic and fry for a few seconds until a wonderful smell spreads. Add the drained sweet potato cubes and sauté for about a minute.
Add the sauce and the contents of Skinny Pasta pack (including the liquids). Saute for 2-3 minutes and remove from the heat. Taste and add soy sauce if necessary.
Transfer to a serving bowl, garnish with roasted sesame seeds, chives or green onions and serve.