In a 4-qt saucepan, combine the coconut milk, cream of coconut, shallots, lemon leaves, chili sauce, and Seafood Brodo. Bring to a simmer over medium heat and allow to simmer for 5 minutes to combine flavors. Turn off heat; leave the pan on the stove.
SOUP
Place the oil and bacon in a heavybottomed saucepot. Cover the pot and set over low heat. Render the bacon until it begins to crisp, stirring occasionally. Add the celery, garlic, and onions. Cover and sweat over low heat until the vegetables are translucent.
Add the lemongrass and cook for 2 additional minutes.
Add the flour and cook for 3 additional minutes, stirring constantly.
Add the clam broth and stir until smooth. Bring to a light simmer and continue to cook, stirring occasionally, for 5 minutes.
Add the potatoes and half of the cream. Simmer gently until the potatoes are just cooked, 7–10 minutes.
Add the Tabasco, honey, and thyme. Season with salt and pepper to taste.
ASSEMBLY
At time of service, bring the poaching liquid to a strong simmer. Add the clams and cook gently until they open.
Remove the clams from their shells and place in a small amount of the warm broth for service.
Heat 4 soup bowls. Finish the chowder with cold diced butter and divide among the bowls.
Spoon 2 Tbsp poaching liquid along with 6 clams into each soup bowl. Garnish with 3 fried sage leaves, toasted coconut, and lemon zest.