Slow Cooker Steak Tips with Mushrooms | Food Stuff

Ingredients

• 4 cups beef broth
• 3 tablespoons cornstarch
• 8 ounce cremini mushrooms, halved
• 1/2 teaspoon dried thyme
• 2 tablespoons chopped fresh parsley leaves
• 3 cloves garlic, minced
• Kosher salt and freshly ground black pepper, to taste
• 2 tablespoons olive oil
• 1 onion, diced
• 2 teaspoons red wine vinegar, optional
• 2 pounds stew meat, cut into 1/2-inch cubes
• 1 tablespoon tomato paste
• 1 tablespoon Worcestershire sauce