Portobello Pot Roast - Instant Pot / Slow Cooker

Ingredients

• 1 1/2 lbs. of baby red potatoes, washed and cut into bite-sized pieces
• 1 lb. baby bella mushrooms, cut into bite-sized pieces
• 1 cup carrots, peeled and chopped
• 2 cups white onion, chopped
• 4 cloves (4 tsp.) garlic, minced
• 3 sprigs fresh thyme
• 3 cups vegetable broth, divided
• 1/2 cup dry red wine
• 3 Tbsp. tomato paste
• 2 Tbsp. Worcestershire Sauce
• 2 Tbsp. cornstarch