In a large saucepan, brown the pork, half at a time, with the sambal oelek in the oils. Season with salt and pepper. Add the green onions and garlic and cook for 1 minute.
Add the broth, sweet potato, ginger, and star anise and bring to a boil. Cover and simmer gently for about 10 minutes or until the potato is tender. Add the noodles and cook for about 2 minutes. Remove the ginger slices and star anise. Adjust the seasoning. Serve sprinkled with cilantro.
You can find the cooked udon noodles, vacuum-sealed, in the Asian food section of most grocery stores.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.