Step 1: Prepare the Spice Paste - Combine shallots, garlic, red chilies, ginger, galangal, and lemongrass in a food processor or blender. Blend until a smooth paste forms, adding a splash of water if necessary.
Step 2: Sauté the Spice Paste - Heat vegetable oil in a large pot over medium heat. Add the spice paste and sauté for about 5-7 minutes until fragrant.
Step 3: Add the Beef - Add the chuck beef pieces and stir to coat. Cook for about 5 minutes until browned.
Step 4: Pour in Coconut Milk and Water - Add coconut milk and water, stir, and bring to a gentle simmer.
Step 5: Add Aromatics - Incorporate bruised lemongrass, kaffir lime leaves, cinnamon stick, star anise, cardamom pods, turmeric, ground coriander, tamarind paste, and brown sugar.
Step 6: Slow Cook - Reduce heat to low, cover, and let simmer for 2-3 hours. Stir occasionally and add water if needed.
Step 7: Final Seasoning - Taste and add salt to taste, adjusting sweetness or tanginess with more brown sugar or tamarind paste if needed.
Step 8: Serve and Enjoy - Serve hot, garnished with kaffir lime leaves. Pairs well with rice or flatbreads.