Easy Slow Cooker Sweet and Sour Beef Family Fave

Ingredients

• 3-4 lb (1.3-1.8 kg) beef chuck roast
• 1 tablespoon (15 ml) olive oil
• Salt and freshly ground black pepper, to taste
• 1 medium onion, sliced
• 2 cloves garlic, minced
• 1 cup (240 ml) beef broth
• ¾ cup (180 ml) ketchup
• ⅓ cup (65 g) packed brown sugar
• ⅓ cup (80 ml) apple cider vinegar
• 2 tablespoons (30 ml) soy sauce
• 1 tablespoon (15 ml) Worcestershire sauce
• 1 green bell pepper, chopped
• 1 red bell pepper, chopped
• 1 can (8 oz / 227g) pineapple chunks, drained (reserve juice if desired)