Creamed Hamburger

1 lb hamburger
2 T butter
1/2 onion chopped
1 tsp salt
1 1/2 C cold milk
2 to 3 T flour

Melt butter, add hamburger, onion, and salt. Brown hamburger. After browned, place over on pan and let cook over low heat for 10 to 15 minutes. Remove from heat and add flour. Stirring, add milk and cook until thick. Serve on toast, mashed potatoes or noodles.