lentil soup with kielbasa

Ingredients

• 3 tablespoons olive oil
• 3 - carrots, diced
• 3 - celery stalks, diced
• 4 - garlic cloves, minced
• 1 - onion, large, diced
• 1 package kielbasa, diced
• 1 pound bacon, cooked and crumbled
• 8 cups beef stock
• 1 pound lentils, dry, rinsed
• 1 can crushed tomatoes, 28 ounces
• 1 teaspoon italian seasoning
• 1 1/2 - 3 teaspoons balsamic vinegar (takes it from a good soup to a wonderful soup..don't skip it)
• 1 teaspoon pepper
• - salt to taste