Chicken and Dumplings

Ingredients

• 3 1/2 to 4 lb chicken legs
• 1 onion
• 2 carrots
• 2 ribs celery
• 1 1/2 tsp kosher salt
• 2 bay leaves
• 6 sprigs fresh thyme
• 10 black peppercorns
• 1 head of garlic
• small bunch parsley
• 1 to 2 leeks
• 2 cloves garlic
• 9 tbsp unsalted butter
• 12 to 18 tbsp all-purpose flour (see note)
• 4 sprigs fresh thyme
• 1/4 cup heavy cream
• sea salt (to taste)
• freshly ground black pepper (to taste)
• 6 to 8 cups chicken broth
• 1/4 cup green onions
• 2 cups all-purpose flour
• 1 tbsp baking powder
• 2 tsp kosher salt
• 2 large eggs
• 1 cup buttermilk
• 1 cup frozen peas