Rinse the red beans until the water runs clear. Soak them in water for 5 to 6 hours.
Set the SAUTE mode of an instant pot for 6 minutes. Add olive oil to the inner pot along with garlic, celery, bay leaf, and onion. Saute for a minute to release the aroma of the ingredients. No need to brown the onion or garlic.
Next, add the red wine vinegar (optional), tomato paste or sauce, vegetables, and soaked beans. Saute for a minute.
Add vegetable stock, salt, and stir to combine. Seal the lid of the instant pot. PRESSURE COOK for 20 minutes or till red beans is al dente. Skip this step if you are using canned or pre cooked beans.
After 20 minutes, release the steam manually. Add pasta, thyme, oregano, pepper, and stir. Seal the lid of the instant pot. Once again, PRESSURE COOK the soup for 5 minutes.
Release the steam manually so the pasta doesn't soak up all the liquid. Add fresh herbs, and grated cheese.
Serve Minestrone Soup warm with the slices of toasted bread.