Vegan "Buttermilk" Cornbread - Jazzy Vegetarian - Vegan and Delicious!

Ingredients

• ¼ cup, plus 1 teaspoon extra-virgin olive oil, divided
• 1¼ cups unsweetened dairy-free milk
• 2 tablespoons freshly squeezed lemon juice
• 1¼ cups medium grind gluten-free cornmeal (see Chef’s Note)
• 1¼ cups (firmly packed) freshly ground, gluten-free oat flour, plus more as needed (see “How to Make Oat Flour,” below)
• ⅓ cup (very firmly packed) vegan dark brown sugar
• 1 tablespoon baking powder
• ¼ rounded teaspoon salt