Slow Cooker Shredded Orange Beef - Foodness Gracious

Ingredients

• 3 1/2-4 pounds beef chuck roast
• 1 pinch kosher salt
• 2 tsp black pepper
• 2 tbsp olive oil
• 1 whole orange juice and zest
• 1 whole shallot finely sliced
• 3 whole garlic cloves minced
• 1 13 ounce jar blackberry preserves
• 1/2 cup beef stock
• 1 tbsp fresh chopped rosemary
• 3 tbsp cornstarch
• 4 tbsp warm water