Place chocolate pieces in medium size bowl, cover; cook in Radarange oven 2 minutes until chocolate softens.
Add coffee, milk, and butter; cook in oven 3 minutes.
Mix eggs, sugar, salt, and vanilla.
Stir hot chocolate mixture into egg mixture.
Place bread cubes in 1 1/2 quart casserole; pour chocolate egg mixture on cubes, sprinkle with cinnamon.
Set casserole in larger pan, add 1 cup boiling water to pan.
Cook in oven 9 to 10 minutes, turning 180° 3 times.
Let stand 10 minutes.