Slow Cooker Savory Potato and Beef Soup

Ingredients

• 1 1/2 pounds ground beef
• 1 tablespoon olive oil
• 1 medium onion, diced
• 3 cloves garlic, minced
• 4 cups beef broth
• 2 cups water
• 5 medium russet potatoes, peeled and diced
• 3 carrots, diced
• 2 celery stalks, diced
• 1 can (14.5 ounces) diced tomatoes, undrained
• 1 teaspoon dried thyme
• 1 teaspoon dried oregano
• 1 bay leaf
• Salt
• pepper
• Chopped fresh parsley for garnish (optional)