Onion Gravy

Instructions

1. Prepare the onions
   Peel and thinly slice the onions into half-moons. For the best flavor, make sure they're sliced consistently so they cook evenly.
2. Caramelize the onions
   Heat the butter and oil in a large skillet over medium heat. Add the onions and cook slowly, stirring occasionally, for about 20-25 minutes until they're deeply golden brown and caramelized. Don't rush this process as it builds the fundamental flavor.
3. Create the roux
   Once the onions are caramelized, sprinkle the flour over them and stir continuously for 2 minutes to cook out the raw flour taste and create a roux that will thicken your gravy.
4. Add liquids and seasonings
   Gradually whisk in the beef stock, ensuring there are no lumps. Add the Worcestershire sauce, balsamic vinegar, thyme, and bay leaf. Bring the mixture to a gentle simmer.
5. Simmer and reduce
   Reduce heat to low and simmer uncovered for about 10 minutes, stirring occasionally, until the gravy has thickened to your desired consistency. The gravy will continue to thicken as it cools.
6. Season and finish
   Remove the bay leaf. Season with salt and pepper to taste. If you prefer a smoother gravy, you can blend it with an immersion blender, though the texture of the onions is part of its charm.