Using an aluminum or non-stick skillet, place on low heat and drizzle some Extra Virgin Olive Oil in the pan.
After about a minute, drop the sourdough batter into the center of the pan and spread gently with a spoon. You want to match the size of your omelette.
Let the pancake cook for about a minute and sprinkle Montreal steak seasoning to your liking. Go easy--it is salty.
Once the batter looks firm on top and you see lots of holes from the bubbled batter, flip it over with a spatula. Sprinkle a tiny bit more seasoning. You are looking for a nice golden color. If not, just wait and finish it off after the current side is done. The side with the seasoning will look different due to the seasoning and have a different color. The golden side is the outside of the sandwich.
Allow the other side to cook for a minute or two. Once you detect a faint smell resembling burned toast, you can flip and ensure the other side is done. Transfer to a plate with a paper towel to drain excess oil.