Three Onion Chowder with Parsleyed Oyster Crackers

Name: Three Onion Chowder with Parsleyed Oyster Crackers
Ingredients: For the Soup:; 3 ounces pancetta, 1/4-inch dice; 2 cups yellow onion, peeled and julienned; 2 leeks, rinsed, white parts only, sliced into half moons; 4 shallots, peeled and sliced; 1/3 cup celery, 1/4-inch dice; 1 1/2 tablespoons fresh garlic, minced; 1 teaspoon fresh thyme, minced; 1 bay leaf; 2 cups chicken stock; 2 cups half and half; 3 russet potatoes, peeled and cut into 1/2-inch dice; 1 tablespoon Italian parsley, minced; 1 tablespoon fresh chives, chopped; Kosher salt and fresh ground pepper; Parsleyed Oyster Crackers; 1 tablespoon unsalted butter; 1 cup oyster crackers; Fine sea salt and fresh ground pepper