Step 1

Grease a 7x11-inch baking dish.

Step 2

In a large skillet over medium heat, cook the sausage, while stirring often, until it crumbles and is no longer pink, about 8 minutes.

Step 3

Drain the fat from the skillet.

Step 4

Arrange the bread pieces in a single layer in the prepared baking dish.

Step 5

Top the bread layer with the cooked sausage, the Swiss cheese, and the cheddar cheese.

Step 6

Combine the milk, the Dijon mustard, the eggs, the Worcestershire sauce, the salt, and the pepper.

Step 7

Pour the milk mixture over the layers in the baking dish.

Step 8

Cover the baking dish and chill for at least 8 hours and up to 24 hours.

Step 9

Preheat the oven to 350 degrees F.

Step 10

Bake until the casserole is set, about 40 minutes.

Step 11

Serve.