Put Instant Pot on saute mode and heat up 1 tbsp of olive oil.
Once hot, saute chopped onions, minced garlic, sliced jalapeños/serrano and crushed red peppers. Cut down on serrano and/or crushed red peppers if not want to make it spicy.
Once onions are translucent, add sliced zucchini, chopped carrots, chopped celery, kidney beans (drain the water that comes in the can and give it a good wash before adding them to the pot).
Add crushed tomatoes, vegetable broth, pesto, all the spices, herbs and salt.
Mix it very well. Add uncooked tortellini and mix it again. Bring it to boil while keeping IP on saute mode. Taste it and add more herbs and/or salt if needed.
Once it comes to boil, cancel out the saute mode. Close the lid, secure the valve and put IP on low pressure for 2 minutes!
Once the cook time is over, let the pressure release naturally only for 2-3 minutes. Let the rest of the pressure release manually.
Once the security valve is down, open the lid carefully and add chopped baby spinach to the soup. Mix it gently. The eat of the soup should wilt the spinach!
Serve it hot with some freshly shredded parmigiano reggiano!