Italian bean and vegetable soup

Ingredients

• • 2 tsps olive oil
  • 1 yellow onion, chopped
  • 1 medium stalk celery, chopped
  • 1 large carrot, sliced into coins
  • 2 garlic cloves, minced
  • 4 cups low-sodium chicken broth
  • 2 (15.5 oz) cans no-salt-added Great Northern beans, drained and rinsed
  • 1 (14.5 oz) can no-salt-added diced tomatoes, undrained
  • 1 tsp dried oregano
  • ½ tsp dried thyme
  • ¼ tsp crushed red pepper flakes
  • 3 cups baby spinach
  • ⅓ cup grated Parmesan cheese