Cut corn into several parts, set aside.
Blend garlic, shallot, and thai chili with a blender until smooth. Heat oil in a wok over medium heat, sautee blended spices mixture with bay leaves and lime leaves until fragrant.
Add water and the rest of the spices ingredients except cornstarch and the green part of the spring onion then stir until well combined.
Add crab, shrimp, squid, and corn. Cover with a lid and boil until cooked. Add cornstarch and the green parts of the spring onion then stir until the sauce is thickened.
Indonesian seafood boil is ready to serve. Enjoy!