Blend oil or melted butter, egg, milk, almond meal, coconut flour, and baking soda
Pour batter into a greased 4" cake pan
Smooth top with a dampened spatula
Sprinkle with sesame seeds (if desired)
Bake for 18-20 minutes in a 350 degree oven or, cook bun in the microwave. (Grease a 4" round microwave safe ramekin. Cook at full power for 55 - 60 seconds)