Preheat your oven to 350°F (175°C).

Grease your muffin tin well or line it with muffin liners.

Cut your bread into small cubes and place them in a large mixing bowl.

In a separate bowl, whisk together the eggs, milk, sugar, vanilla extract, cinnamon, and salt.

Pour the egg mixture over the cubed bread and gently fold it in using a spatula.

Drizzle the melted butter into the mixture and fold gently until incorporated.

Spoon the mixture into the prepared muffin tin, filling each cup about 3/4 full.

Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until the tops are golden and a toothpick comes out clean.