Kare Kare Pata (Oxtail Stew)

INGREDIENTS

• 4 1/2 pounds beef oxtails
• 3 cups water
• 2 beef bouillon cubes
• 1/2 pound bok choy, chopped
• 1/2 pound long beans, cut into bite-sized pieces
• 1/2 pound eggplant, cubed
• 2 tablespoons olive oil
• 1 onion, chopped
• 2 cloves garlic, minced
• 1 teaspoon achiote powder
• 3 tablespoons smooth peanut butter