I’ve made vegetable stocks in many ways. The traditional way, in a pressure cooker… and finally this way – sous vide.
Cooking the stock sous vide is almost like a very gentle infusion. It makes the vegetable flavors very clean and distinct whereas vegetable stocked cooked other ways is stronger and a bit more mono flavored. It’s also quite easy and you can do other stuff while the stock is cooking sous vide for hours. Preparing the vegetables will take a while though, it takes me around 1.5 hours.
The final yield will be around 500 g stock.
Ingredients for Vegetable stock, en sous vide:
280g onion, thinly sliced
200g carrots, thinly sliced
100g celery, thinly sliced
100 leeks (white parts only), thinly sliced
50g button mushrooms, thinly sliced
50g tomato, chopped
10g chives, sliced
10g flat-leaf parsley, chopped
1g coriander seeds
1g black peppercorns
0.5g fresh bay leaf
0.5g star anise, crushed
How to make Vegetable stock, en sous vide:
Preheat your water bath to 85C.
Put the ice in the sous vide bag (I use a 1 gallon/3.8 liter bag) and then the rest of the ingredients. Vacuum seal on full vacuum and then cook sous vide for 3 hours.
When done put the sous vide bag in the fridge and let infuse for 12 hours. This will let the flavors infuse more fully. Strain and pass through a SuperBag.
Portion then refrigerate or freeze for later use.