Warm milk in saucepan.
Put crackers into milk; set aside.
Assemble Food Grinder with Fine Disc.
Grind ham and cheese into small mixer bowl.
In large mixer bowl, beat eggs at HIGH until light and thick (about 5 minutes).
Add cracker mixture, ham-cheese mixture, and Worcestershire; fold with rubber spatula until evenly mixed.
Pour into a greased 2-quart (2 liter) casserole.
Bake at 350°F (180°C) for 30 minutes.
Reduce temperature to 275°F (140°C) and bake an additional 30 minutes.