Add the remaining ingredients to a slow cooker, top with the browned beef, season, and cover.
2 cups pearl onion, 2 sweet potatoes, 2 celery stalks, 4 garlic cloves, 2 cups beef stock, 2 tbsp. tomato paste, 2 cups carrot, 2 bay leaf, 1 tsp. thyme, Sea salt and freshly ground black pepper