Preheat your oven to 350°F (175°C) and grease a muffin tin with butter or non-stick cooking spray.

In a large mixing bowl, whisk together the eggs, milk, sugar, vanilla extract, cinnamon, and salt until well combined.

Cut the bread slices into quarters and gently fold them into the egg mixture, ensuring each piece is coated.

Using your fingers, press the bread pieces into the greased muffin tin, forming cups.

Pour any remaining egg mixture evenly over the bread cups in the muffin tin.

Bake in the preheated oven for 15-20 minutes, or until the tops are golden brown and the egg is set.

Allow to cool for a few minutes before removing the cups from the tin.

Serve warm with optional toppings like maple syrup, powdered sugar, or fresh fruit.