Overnight Ham and Cheese Omelet

1 teaspoon butter for greasing, or as needed

12 slices firm bread, discard crusts and cube bread

1 cup cubed Cheddar cheese

1 cup cubed ham

3 cups milk

6 large eggs

½ teaspoon dried thyme

½ teaspoon salt

½ teaspoon ground black pepper

Butter bottom and sides of a shallow roasting dish.

Layer bread, Cheddar cheese, and ham in prepared roasting dish.

Beat milk, eggs, thyme, salt, and black pepper together in a bowl.

Pour egg mixture over bread mixture; cover and refrigerate 8 hours or overnight.

Preheat oven to 350 degrees F (175 degrees C).

Bake uncovered egg mixture in the preheated oven until center is set, about 1 hour. Allow to sit and cool for 15 minutes before serving.