Slow Cooker Garlic Onion Pot Roast

Ingredients

• 3–4 lb beef chuck roast
• 2 tbsp olive oil
• 2 tsp salt
• 1 tsp black pepper
• 2 tsp garlic powder
• 1 tsp onion powder
• 1 tsp smoked paprika
• 1 tsp dried thyme
• 1 tsp dried rosemary
• 1 large onion, sliced
• 6 garlic cloves, roughly chopped
• 2 cups beef broth
• 2 tbsp Worcestershire sauce
• 2 tbsp tomato paste
• 1 tbsp brown sugar
• 2 tbsp unsalted butter
• 1 tbsp cornstarch
• 2 tbsp cold water
• 2 tbsp chopped fresh parsley