1Boil oxtail in water for 2.5 hours until very tender.
2Reserve 6 cups of broth and shred oxtail meat.
3Toast rice flour in a dry pan until golden. Set aside.
4Heat oil and annatto seeds. Strain out seeds, keep oil.
5Sauté garlic and onion in annatto oil until fragrant.
6Add peanut butter and toasted rice flour. Gradually add broth.
7Simmer sauce until thickened, stirring constantly.
8Add oxtail and vegetables, cook until vegetables are tender.
9Serve with rice and shrimp paste on the side.
Toast rice flour for better flavor. Traditionally served with shrimp paste (bagoong).