Cook udon noodles according to package directions; drain. In a large wok or saucepot, brown pork and garlic. Add shrimp, chicken, and patis; stir-fry until shrimp turn pink. Dissolve achuete powder in the hot water; add to wok. Cover and simmer for 30 minutes. To wok, add chicken broth and bring to a boil; add cooked noodles, long rice, salt, and pepper. Stirring frequently, cook uncovered for 10 minutes. Add chives just before serving. Serve immediately. Makes 8 servings.
*If desired, slivered shiitake mushrooms can be substituted for the shrimp.