Cut onions, ginger, shallots and garlic. Feel free to leave the skin because we will ladle it out later.
Turn on Instant Pot on Custom Setting on High Temperature. Saute onions, ginger, shallots, garlic and cinnamon stick for 5 minutes until brown. If you don’t have an instant pot, follow my pot instructions in the next section ‘Stovetop Instructions’ below.
Place coriander, fennel, star anise, 2 bay leaves in a cheese cloth or strainer to ensure that the spices stay in one place. Add chicken, spice bag, and water in the instant pot.
Turn settings to pressure cook on low for 30 minutes (custom setting). Press start button.
Once your chicken pho is done, start making your rice noodles. Soak them in boiling water for 5 minutes and strain. Set noodles aside. This ensures that your noodles stay al dente and not too mushy versus putting the noodles in the pot while cooking the broth.
Your soup is ready! Open the pot and take out all the onions, garlic, corriander, fennel and spice bag. Spoon or skim the top of the soup to get rid of the oil and chicken skum.
Add the following seasoning to pot (adjust to your own seasoning level): 3 tablespoons fish sauce (adjust to your liking), 1 teaspoon sugar, and 1 teaspoon salt.
Serve the chicken soup with your desired herbs like cilantro, jalapenos thai basil, bean sprouts, noodles.