Swiss Chard Ravioli

INGREDIENTS

• 64 gyoza (potsticker) wrappers* (from two 12-ounce packages)
• 1 garlic clove, minced
• 1/3 cup freshly grated Parmesan cheese
• 1/2 teaspoon chopped fresh rosemary
• 1/4 cup water
• 3/4 cup (1 1/2 sticks) butter
• Additional freshly grated Parmesan cheese (optional)
• 1 teaspoon chopped fresh thyme
• 3/4 teaspoon salt
• 1/4 teaspoon ground black pepper
• 1 pound Swiss chard, center spine and stems trimmed
• 1/4 cup chopped fresh sage
• 1 large egg
• 1 cup ricotta cheese
• 1 large egg white, beaten to blend