Place an 8-quart stockpot over medium heat and cook the bacon until crispy, about 5 minutes. Remove the bacon and drain on paper towels. Add the onions, carrots, and celery and cook, stirring often, until vegetables are soft, about 5 minutes. Add the garlic and cook until fragrant, about 30 seconds. Add the bell peppers and corn to the pot and cook for 10 minutes, stirring often. Sprinkle the flour into the pot and cook, stirring constantly, for 5 minutes. Pour the Chicken Stock into the pot and stir to combine. Use a whisk if necessary to break up any lumps. Add the potatoes to the pot and bring to a boil, then reduce to a simmer and continue to cook for 20 minutes. Season the chowder with the salt and cayenne and stir in the cream. Serve with the bacon and parsley as garnish.
Makes 3 quarts, 10 to 12 servings