Perfect Slow Cooker Pot Roast

Ingredients: 3-4 pound beef chuck roast Salt and pepper, to taste 2 tablespoons olive oil 1 large onion, sliced 4 cloves garlic, minced 1 cup beef broth 1 cup red wine (or additional beef broth) 2 tablespoons tomato paste 2 tablespoons Worcestershire sauce 4 large carrots, peeled and cut into chunks