Heat oven to 450 degrees. On two rimmed baking sheets, toss brussels sprouts and grapes with oil and thyme. Season with salt and pepper. Roast, until caramelized and tender, about 20 minutes.
Drizzle each tray with 1 teaspoon vinegar and scrape up any caramelized bits with a wooden spoon. Toss in walnuts.
I made this recipe today and plan on making it again on Thanksgiving. Very good!
My partner made this for Thanksgiving and it was a big hit. We've had it again since then. Excellent!
We made this last night, exactly as written, and loved it. My husband, who is not wild about Brussels sprouts, even like it. We will be making this again.