Mix dry ingredients together in a mixing bowl. (To save on dishes, I tend to use one I can bake in.)
Note: I prefer coarse ground corn meal, but some people like fine. You may find this labeled "polenta".
Cut in oil. (To be honest, I rarely do this, I normally just mix it in.)
Add the egg and milk and stir. A whisk does nicely for this.
Note: I say whole milk, as I prefer it, but any type will do just fine.
From a cold oven, cook for 20-30 minutes, depending on your oven at 400ºF (200ºC, Gas Mark
If your oven is pre-heated, probably more like 15-20 minutes.
You're looking for a golden brown top, and you should be able to stab it with a toothpick or fork and come out clean. If it's not done, the toothpick will come out with batter on it.