Slow Cooker Creamy Tomato Soup (with hidden veggies!)

can crushed tomatoes or diced tomatoes with juice

large carrots (peeled and diced)

large onion (diced)

stalks celery (diced)

tomato paste

chicken broth

dried oregano

fresh basil (or 1 tsp dried)

minced garlic

salt (depending on the salt content in your tomatoes and broth)

red chili flakes (optional)

milk

all purpose flour

parmesan cheese (or any other cheese you have lying around!)