Grease a 9 X 13 baking dish with olive oil and set aside
Combine flour, salt, baking soda, baking powder, sugar, stevia, and pumpkin pie spice together and whisk well in a large mixing bowl.
Add the eggs, milk, and pumpkin puree and pour into baking dish.
Pecan topping
Mix the chopped pecans, maple syrup, flour, and olive oil in a small bowl. Take a teaspoon of the mix and drop it ion top of the batter. Repeat process, placing the teaspoons of pecan mixture about 2 inches apart until all the pecan mixture is applied. Gently run a fork or knife through the pecan topping, swirling it into the batter.
Bake at 350 about 30 minutes or until toothpick comes out clean. Top with powdered sugar for garnish, if desired.