Make dried beef as below. Shred about 6 oz of sliced beef.
Make cream sauce:
1 1/2 cups cold milk
1 Tbsp melted butter
6 Tbsp Wondra or equiv flour
1/4 cup heavy cream
Stir together and microwave until boiling, stopping to stir every minute.
Mix in dried beef and continue to microwave at simmering for another 5 minutes, stirring every minute. Add salt and pepper to taste.
Serve over split biscuits or toast.