Zucchini-Corn Fritters

INGREDIENTS

• 1/2 small onion, finely chopped
• 1 large egg
• Kosher salt
• Freshly ground pepper
• 3/4 cup buttermilk
• 1/2 cup all-purpose flour
• 1 clove garlic, finely chopped
• 2 ears corn, kernels cut off 1/2 cup yellow cornmeal
• Vegetable oil, for frying
• 1/4 teaspoon baking soda
• 2 medium zucchini, coarsely shredded
• 1 tablespoon unsalted butter