Clean and prep the shrimp, lobster, and crab legs by removing shells and washing thoroughly with cool water and lime or lemon juice. Follow along with the video below.
In a large stock pot over medium heat, melt butter, then add onion, thyme, parsley, celery, and black pepper. Cook for 4 minutes, then add the seafood shells and continue cooking for another 4 minutes.
Add 8 cups of water, bring to a boil, and simmer for 45 minutes to make the stock.
In a separate soup pot over medium heat, add oil, onion, garlic, black pepper, and pimento pepper. Cook for 3 minutes. Add the pumpkin and okra, and cook for another minute.
Add the chopped dasheen leaves and spinach in batches, allowing them to wilt. Sprinkle in 3/4 tablespoon salt.
Add the lobster claws and crab legs. Strain the seafood stock into the pot, add coconut milk, and bring to a boil. Cover partially and simmer.
Season the shrimp and lobster tails with lemon juice, Caribbean green seasoning, and remaining salt.
After 90 minutes, remove the lobster claws and crab legs. Use an immersion blender to pulse the callaloo mixture—avoid continuous blending, as it will change the texture and overall flavor. Remove the scotch bonnet pepper if you prefer mild heat. In my case, I broke the pepper to give the finished Callaloo a slight kick from its heat.
Add the shrimp and lobster meat, stir, then return the claws and crab legs. Simmer for 2 minutes, taste, and adjust salt to your liking.
Turn off the heat and serve warm with rice, macaroni pie, or ground provisions.