Step 1
Generously season beef chuck roast with salt and pepper.
Step 2
Heat a large skillet over high heat; add vegetable oil. When oil is hot brown roast on all sides about 2 minutes per side. Remove pan from heat.
Step 3
Spread chopped onions in slow cooker; place browned roast on top of onions.
Step 4
Spoon red chili paste into the hot skillet. Add cumin and coriander. Rub mixture into hot oil with the back of a spoon to blend. Place skillet over medium heat.
Step 5
Pour in chicken stock. Return heat to high. Stir in coconut milk. Add diced tomatoes with green chiles fish sauce brown sugar minced garlic tomato paste and sliced ginger; stir in lime juice. Bring to a boil.
Step 6
Pour mixture over pot roast; add bay leaves. Stir to distribute ingredients in the slow cooker.
Step 7
Cover slow cooker and set to Low. Cook until fork tender 7 to 8 hours.
Step 8
Remove meat from the broth. If desired skim some fat from the surface of the broth.
Step 9
Place potatoes and bok choy into the broth; stir. Cover and turn heat to high. Cook until potatoes are tender about 12 minutes.
Step 9
Blend cornstarch and water in a small dish until dissolved. Stir into broth mixture.