Sweet Potato Waffles, Sweet or Savory

INGREDIENTS

• 1 teaspoon orange zest
• 2 tablespoons brown sugar (increase up to 1/4 or 1/3 cup if you know you want your waffles for something sweet)
• 1/2 teaspoon ground ginger
• 4 large eggs, lightly beaten
• 2 1/4 teaspoons baking powder
• 2 1/2 cups flour
• 1 teaspoon baking soda
• 1 can (13- or 14-ounce) coconut milk
• 6 tablespoons unsalted butter, melted
• 1 1/4 cup pureed sweet potatoes (or pumpkin, or other winter squash)
• 1 teaspoon salt