All home cooks should have a go-to vegetable broth recipe in their arsenal. This version will make any broth-based soup swoon-worthy. Also use it instead of ho-hum water when cooking grains such as quinoa or rice, for deglazing pans, and sautéing greens. Going the extra mile and sautéing the vegetables first adds an extra layer of flavour.
Heat oil in large saucepan over medium heat. Add potato, leeks, carrot, celery, and parsnip. Cook, stirring occasionally, for 10 minutes. Add garlic and wine to pan; boil for 2 minutes. Add tomato, parsley, thyme, bay leaf, peppercorns, and 10 cups (2.5 L) water. Bring to a simmer, reduce heat, and simmer gently, partially covered, until liquid is flavoured to liking, about 1 to 1 1/2 hours. Strain through fine sieve into large bowl. Transfer to container and chill for up to 5 days.