Onion Gravy

Directions

1. 1
   Melt the butter in a large skillet over medium heat.
2. 2
   Cook the onions, stirring, until golden, 10 to 15 minutes.
3. 3
   Cover; cook over low heat until brown, about 25 minutes.
4. 4
   Add the flour.
5. 5
   Cook, stirring constantly, 2 minutes.
6. 6
   Remove from heat; whisk in the wine, stock, and Worcestershire sauce.
7. 7
   Bring to a boil.
8. 8
   Reduce heat; simmer until thick, about 10 minutes.
9. 9
   Season with salt and pepper.
10. 10
    Serve immediately.