Preheat your oven to 220C/200C Fan/Gas Mark 7 and spray a large baking tray with non-stick cooking spray.
In a medium bowl, whisk together the eggs, milk, cinnamon, vanilla extract, and salt until well-combined.
Pour the egg mixture into the prepared tray.
Place the bread slices on the tray in a single layer; let them sit for about one minute to soak up some of the egg mixture.
Flip the bread slices over and let them sit a little while longer until the egg mixture has been fully absorbed into the bread.
If needed, tilt the pan around to get the egg mixture under the bread slices. You can also flip the bread another time or two.
Bake in the bottom half of the oven for 10 to 12 minutes or until the bottom of the bread is golden brown.
Start checking the French toast at eight minutes to ensure it is not getting too brown.
Once browned, flip the bread slices over and bake for an additional five to 10 minutes or until the other side is golden brown.
Serve immediately.
