Eggs A La Regence

6 eggs
1/2 cupful of chopped cold cooked ham
1 grated onion
1/2 can of chopped mushrooms
2 tablespoonfuls of butter
2 tablespoonfuls of flour
1/2 pint of chicken stock
1/2 teaspoonful of salt
1 saltspoonful of pepper

Stand the ham over hot water until thoroughly heated. Rub the butter and flour together, add the stock, stir until boiling, add the mushrooms, sliced, the salt, pepper and the onion; stand this over hot water while you poach the eggs. Dish the eggs, cover them with the sauce, strained, and cover with the chopped ham. Garnish the dish with mashed potatoes or boiled rice, and send at once to the table.