aka Creamed Beef
In a medium saucepan over low heat, melt butter and bacon grease. Whisk in flour all at once to form a roux. Whisk in milk, a little at a time, increase heat to medium-high, and cook, stirring, until thickened. Add pepper. Bring to a boil and stir in beef.
Serve over artisan bread or Texas toast, toasted.