Preheat the oven to 400°. Grease an 8-inch-square baking pan with 1/2 tablespoon of oil. In a bowl, whisk the cornmeal, salt, baking powder and baking soda. In another bowl, whisk the buttermilk with the eggs, honey and the remaining 2 tablespoons of oil. Stir the buttermilk mixture into the dry ingredients with a rubber spatula just until blended.