Once your beef cheeks have cooled and you have skimmed off the hardened fat, do not throw away that liquid! It is liquid gold. Because you cooked the meat low and slow overnight, the liquid is absolutely packed with natural gelatin. This means it will reduce into a thick, restaurant-quality lacquer without needing any cornflour or thickeners.
Here is how to refine and customise your final jus:
1. Strain the Base
Remove the cold beef cheeks from the pot and set them aside. Pour the remaining braising liquid through a fine-mesh strainer into a wide saucepan. Press down gently on the skin-on garlic cloves with the back of a spoon to squeeze their sweet, mellow paste directly into the liquid, then discard the skins and woody thyme stems.
2. Reduce for Gloss and Body
Place the saucepan over medium-high heat and bring it to a rapid simmer. Leave it uncovered. Let the liquid reduce by about half until it naturally thickens and coats the back of a spoon beautifully.
3. Adjust and Balance the Flavours
Taste the reduced liquid and balance the four pillars of flavor to your liking:
The Umami Boost:
Add a few shakes of Worcestershire sauce for an earthy, savory depth.
The Acid Cut:
If the sauce tastes a bit too heavy or rich, add a splash of red wine vinegar to brighten it up.
The Sweet Balance:
If the red wine left a slightly bitter or dry edge, stir in a tiny pinch of brown sugar to round it out.
The Finishing Salt:
Add a pinch of sea salt only if the flavors need an extra pop.
4. Optional Flavor Variations to Try
Before you finish reducing, you can take your jus in a few different directions depending on your main meal:
The Bistro Mustard Jus:
Whisk in 1–2 teaspoons of Dijon or wholegrain mustard right at the end. It adds a sharp, tangy kick that cuts beautifully through the rich beef fat.
The Fresh Herb Refresh:
The long overnight cook extracts all the oils from the initial thyme, leaving it mellow. Stir in a tablespoon of finely chopped fresh rosemary, tarragon, or flat-leaf parsley in the last 2 minutes of simmering for a vibrant, aromatic punch.
The Luxe Butter Glaze:
Turn off the heat and whisk in a knob of cold, unsalted butter. This technique (called monter au beurre) gives the jus a brilliant, glossy mirror shine and a silky mouthfeel.
5. The Final Glaze
Turn the heat down to low, return the beef cheeks to the pan, and spoon the hot, glossy jus over the top until the meat looks completely lacquered and glistening.