My sister Kathy makes this recipe for special occasions and it's delicious. Note that you should start the prep the night before.
(Optional: add more bread on top, in this case use a little extra milk and eggs)
Melt margerine in the bottom of a 9x13 pan. Mix in brown sugar. Sprinkle cinnamon on top
Lay in bread slices, packed tight. Mix the milk and eggs, then pour over bread.
Preheat oven to 350* and bake for 30 min.
Notes: I haven't tried this yet.