Ingredients
Method
- Preheat the oven to 450°F.
- Dice the vegetables into roughly 1-inch chunks. Leave the garlic cloves and mushrooms whole.
- In a large bowl, toss the vegetables with the oil.
- Spread the veggies on two rimmed baking sheets.
- Roast the vegetables for 30 minutes. Give them a stir and return the baking sheets to the oven, rotating the pans if they’re not cooking evenly.
- Roast for another 30 to 45 minutes, until the veggies are well roasted and browned.
- Transfer the vegetables to a large pot.
- Pour ½ cup of the white wine onto each baking sheet and scrape up any browned bits that are stuck to the pan.
- Pour the liquid from the baking sheets over the vegetables in the pot and cover with 3 quarts (12 cups) of cool water.
- Add the parsley, rosemary, salt, and peppercorns and bring to a boil over high heat.
- Turn the heat down to medium until the broth is at a low boil.
- Continue cooking at a low boil for 45 minutes to 1 hour, until the liquid has reduced by about one-quarter.
- Strain the broth, pressing out as much liquid from the vegetables as possible, and discard the vegetables. Store the broth in a glass jar in the refrigerator for up to 1 week or in the freezer for up to a year.
Slow Cooker Instructions: After completing Step 3, transfer the roasted vegetables to a slow cooker. Complete Step 4, then pour the liquid from the baking sheets into the slow cooker with the vegetables. Add the remaining ingredients and 2 quarts of cool water. Cook on low for 6 to 8 hours, until the vegetables are very soft. Strain and store the broth as described in Step 6.
