Cut grilled fish into bite-sized cubes.
In a medium pot cook the bacon until crisp, about 5 minutes; drain on paper towels and set aside. Leave 1 tablespoon of fat in the pan; discard the rest.
Cook onion, celery, and red pepper in the bacon fat until they begin to soften, about 2 - 3 minutes. Season with salt and pepper.
Add corn and wine and cook until wine is reduced by half, about 5 minutes.
Add clam juice, water, half-and-half, and saffron. Add lemon juice and whisk with a metal whisk (to prevent the half and half from curdling).
Season broth with tabasco and additional salt and pepper if needed.
Add fish, potatoes, bacon, and parsley and simmer until fish and potatoes are heated through, about 5 minutes.