French Toast Casserole

French Toast Casserole
1 large loaf French bread 
8 eggs 
3 cups milk  
4 Tbsp sugar 
1 tsp cinnamon 
¾ tsp salt 
1 tsp vanilla 
4 Tbsp butter, cut into small pieces  

Tear bread into 1-2 inch chunks. Put torn bread in a 12" Dutch oven. Beat together all remaining ingredients, except butter. Pour over bread. Dot the top with butter. Bake at 350° with 9 coals on bottom and 15 on top. It should be done in 30-45 minutes, when eggs are set.