Slow Cooker Italian Beef Sandwiches

Ingredients

• 4 pounds beef chuck roast
• 1/2 cup Italian dressing Robusto or Zesty
• 1 onion Sweet, Sliced
• 1/4 teaspoon salt
• 1/4 teaspoon black pepper
• 4 Ciabatta rolls sliced
• olive oil
• 4 slices mozzarella cheese
• 4 slices provolone cheese
• 15 ounces roasted red peppers, drained and sliced
• 1 clove garlic smashed, optional