Do Ahead Brunch Eggs
["2 Tbsp. butter *", "3 Tbsp. flour", "1/2 tsp. salt", "1/4 tsp. pepper", "1 (12 oz.) can evaporated milk *", "1/2 c. water", "1 1/2 c. shredded Cheddar cheese (6 oz.)", "2 Tbsp. butter", "1 c. sliced mushrooms", "1/4 c. finely chopped onion", "11 or 12 beaten eggs *", "1 c. fresh bread crumbs"]
["*May substitute margarine for butter, evaporated skim milk for evaporated milk and 2 egg whites for each whole egg."]
["butter", "flour", "salt", "pepper", "milk", "water", "Cheddar cheese", "butter", "mushrooms", "onion", "eggs", "bread crumbs"]