Vegetable Stock

Warm the oil or butter in a heavy stockpot over medium-low heat. Add the onion, carrot, celery, leek, and crushed garlic and stir to coat. Sweat gently for 8 to 10 minutes, stirring often, until the vegetables soften and smell sweet and fragrant. The goal is to draw out moisture and develop sweetness WITHOUT color — keep the heat low. Browning here would tint and muddy a stock meant to stay clean and bright.

Stir in the tomato (or tomato paste) and let it cook for a minute to lose its raw edge and lend a gentle savory backbone. Add the bouquet garni and cracked peppercorns, then pour in the cold water — starting cold helps draw flavor out as it heats. The water should cover the vegetables by an inch or two. Bring slowly up toward a simmer; do not let it boil.

Hold the pot at the barest simmer — a few bubbles lazily breaking the surface — for 40 to 45 minutes, uncovered or just barely cracked. Skim any foam that rises in the first ten minutes. Resist cooking it longer: unlike meat stock, vegetable stock turns dull, bitter, and cabbage-like if over-extracted. Taste at 40 minutes; when the broth tastes sweet, rounded, and clearly of vegetables, it is done.

Set a fine-mesh sieve (lined with a layer of cheesecloth for a crystal-clear stock) over a clean bowl or second pot. Ladle the stock through rather than dumping it — disturbing the settled solids less keeps it clearer. Let the vegetables drip on their own; do NOT press them, as pressing forces cloudy pulp and bitterness into the broth. Cool quickly in an ice bath, then refrigerate up to 4 days or freeze for months.