Vegetable Stock

For true vegetarian soups, stews, and other dishes (such as risotto), vegetable stock is a flavorful alternative to water and meat-based stocks. Some recipes call for the vegetables in the mirepoix to be added to the simmering liquid without first cooking; others call for them to be sweated first, without browning. In this recipe, the vegetables are lightly browned to give the stock intense flavor. The resulting richness and complexity are particularly important when there is no base of flavor provided by chicken, beef, or fish. You can vary the flavor by increasing the amount of garlic, replacing the carrots with parsnips, or changing some of the fresh herbs for others. Or add any of the following: dried mushrooms, such as porcini or shiitake (no more than two or three, since they can be overpowering), a few corncobs, some chopped tomato (seeded, if desired), or thinly sliced leeks. If the stock will be used to make Italian dishes, add a rind of Parmigiano-Reggiano cheese once the water has been added. If making a vegetarian dish with other vegetables, use the scraps to flavor the stock, such as beet greens for beet risotto. But be careful to avoid adding anything that is less than fresh or that has too strong a flavor, such as most cruciferous vegetables (including broccoli, cauliflower, and cabbage).