Pesto Vegetable Soup with Tofu or Chicken - The Scramble

Ingredients

• 1 Tbsp. canola or vegetable oil
• 1 yellow onion (diced)
• 4 carrots (sliced)
• 4 stalks celery (sliced)
• 15 oz. extra-firm tofu (drained and diced, or use 1 lb. chicken breast, diced)
• 28 oz. diced tomatoes (with their liquid)
• 32 oz. reduced-sodium chicken or vegetable broth (or use any variety)
• 1/4 cup fresh flat leaf parsley (chopped)
• 1 Tbsp. basil pesto (or more to taste)