Balsamic Braised Cippolini Onions

Ingredients:

• 1 pound cippolini onions
• 1 tablespoon unsalted butter
• 1 tablespoon olive oil
• 3/4 cup balsamic vinegar
• 1/2 cup water
• 3 tablespoons honey
• 2 sprigs rosemary
• 1 bay leaf
• 1/4 teaspoon salt
• 1/2 teaspoon pepper

Source