For the salmon chowder, in a saucepan over medium heat, melt butter. Add onions and sauté 2 minutes or until limp. Add bell pepper and pimiento and sauté 2 minutes. Add clam juice, potato, salt and pepper.
Bring to boil, reduce heat and simmer uncovered, 30 minutes or until potato is tender.
For the buttery crumb topping, preheat oven to 350ûF. Drop garlic into a blender or the feed tube of a processor. Add bread, butter and parsley. Process until uniformly fine. Spread topping in a thin layer on an ungreased baking sheet and bake, uncovered, 15 minutes, turning with a spatula every 5 minutes until golden brown. Set aside while chowder is prepared. Mix salmon into chowder and heat 1 minute. Ladle into 4 bowls and top with buttery crumb topping.