Spiedini alla Romana

Ingredients (12)

• 6 tbsp unsalted butter
• 1 shallot, finely chopped
• 4 anchovy fillets, drained and coarsely chopped
• 1/4 cup white wine
• 1 cup chicken stock
• 1/4 cup nonpareil capers, drained
• 6 large basil leaves, chopped
• 1 tbsp fresh flat-leaf parsley, chopped
• Kosher salt and freshly ground black pepper
• 1 large loaf rustic-style bread, round or rectangle loaf, not-sliced
• 1 clove garlic, cut in half
• 1 lb fresh mozzarella, sliced into 5 half-inch slices