Preheat oven to 375 F
- 12 large eggs
- 1 cup milk
- 1 1/2 tsp. all-purpose flour
- 1 teaspoon baking powder
- 1 teaspoon onion salt
- Salt and pepper to taste
Butter a large rectangular baking dish no larger than 9x12x2.
Whisk the eggs and the milk together in a large mixing bowl.
Combine the dry ingredients together (flour, baking powder, onion salt, salt & pepper), then add the dry mixture to the egg and milk mixture.
Beat everything together for 30-60 seconds until blended, then pour the mixture into the prepared pan and cook uncovered for about 30 minutes, or until the omelette is lightly browned. It should puff up nicely and nearly double in size during the cooking time.
When serving, slide the omelette onto a warm serving dish and drizzle maple syrup over top.