Pumpkin Baked Oatmeal

35min · 9 servings olive oil or avocado oil for greasing 2 cups rolled oats use certified gluten free if needed 2 teaspoons pumpkin spice 1 teaspoon baking powder 1/4 teaspoon salt 1 cup pumpkin puree not pumpkin pie filling 1 1/4 cup milk of choice this works great with almond milk if dairy-free needed 2 large eggs can sub flax eggs to make egg-free 2 teaspoons vanilla 1/3 cup maple syrup or honey chocolate chips, nuts, raisins or topping of choice. optional