Garlic Rosemary Beef Roast + Spaghetti Squash

Return to This Week’s Menu

Garlic Rosemary Beef Roast + Spaghetti Squash

Serves 6  | Prep Time: 15 minutes | Cook Time: 1 hour 30 minutes

Save set aside a lazy day off or weekend to prepare this. If you have a Instapot this dish will come together effortlessly.


  • ½ tablespoons avocado oil, divided
  • 2 medium spaghetti squash
  • 1 teaspoon sea salt
  • ¼ tablespoon fresh ground black pepper
  • 2 pounds boneless beef chuck roast, if it’s in 1 piece have the butcher cut it, into 2-inch pieces (grass-fed if possible)
  • 1 red onion, thinly sliced
  • 5 large garlic cloves, chopped
  • 1 tablespoon fresh thyme leaves
  • 1 tablespoon fresh rosemary, chopped
  • 2 tablespoons tamari
  • 1 tablespoon Dijon mustard
  • 1 cup beef broth
  • ½ cup water
  • 24 ounces mushrooms, we used oyster mushrooms

Chef Tips


Step 1

Preheat oven to 400F.

Step 2

Slice the squash in half lengthwise and scoop out the seeds.

Step 3

Drizzle a ½ tablespoon of avocado oil on the inside of the squash and place them cut side down on a parchment paper lined baking sheet. Use a fork to prick the skins and roast for 30 minutes or until tender.

Step 4

Once roasted, remove from the oven and reduce the heat to 325°F. Flip the squash cut side up to cool. Once cool, use a fork to scrape the “spaghetti” away from the peel.

Step 5

Season the meat with salt and pepper. Then warm the remaining avocado oil over medium-high heat in a Dutch oven. Brown the meat on all sides, about 4 minutes each.

Step 6

Set the browned meat aside to rest while preparing the rest.

Step 7

Add the onions to the Dutch oven over medium heat, scraping up any browned bits from the bottom of the pan. After 2 minutes, add the garlic, thyme, and rosemary. Stir and sauté for another minute.

Step 8

Add the tamari, Dijon, and beef broth, and water, then stir and bring to a boil. Add the meat back into the pot and cover with a lid. Reduce to a simmer and cook for 20 minutes. Transfer the meat into the oven and cook for 2 hours.

Step 9

After 2 hours, add the mushrooms into the Dutch oven, cover, and cook for an additional 30 minutes.

Step 10

When the meat is tender, remove from the oven. Reheat the spaghetti squash and serve with a scoop of the beef and mushrooms over top. Garnish with extra thyme if desired.