
Trim chicken feet of nails and any dark, callused areas. Scrub with rock salt, rinse, and drain well.
In a pot over medium heat, combine chicken feet, enough water to cover, ginger slices, and green onions knot. Boil for about 7 to 10 minutes, skimming scum that floats on top. Drain well and pat dry with paper towels.
Heat about 3-inches deep of oil in a deep pot or wok. Carefully add chicken feet and fry until lightly golden, stirring regularly for even cooking.
Remove chicken feet and soak in a bowl of ice water for about 1 hour or until skin is wrinkled. Drain well and pat dry with paper towels.
In a wide pan, heat oil. Add onions, garlic, and julienned ginger and cook, stirring regularly, until softened.
Add chicken feet. Add fish sauce and continue to cook for 1 to 2 minutes.
Add about 1 cup water and bring to a boil skimming any scum that may float on the top. Lower heat, cover, and cook for about 50 minutes to 1 hour or until chicken feet are very tender. Add additional water in 1/2 cup increments as needed to maintain about 1 cup broth.
Meanwhile, cut ampalaya lengthwise and scrape off seeds and white pith. Slice thinly and place in a bowl, covered in cold water until needed.
Add ampalaya and gently stir to combine. Cook for about 3 to 5 minutes or until tender yet crisp.
Add sugar. Season with salt and pepper to taste. Serve hot.