Prep all the veggies and turn on the instant pot on saute mode. Heat 2 tsps of oil and add the onion, carrot and bell pepper (I skipped it). Saute for 2 minutes and then add the mushroom slices. Cook for another 2-3 minutes, remove and set a side.
Now add a tablespoon of oil and chopped garlic. Saute for 30 seconds and add the red curry paste and saute for 30-45 seconds.
Add the veggie broth or water, coconut milk, peanut butter and salt. Give a mix, degalze the pot and add the pasta and give a mix. Cancel the saute mode. Make sure the pasta is completely immersed in the water.
Close the instant pot and adjust the vent to the sealing position and cook for 5 minutes on manual or pressure cooker mode. Do a natural pressure release after five minutes. ( If you like the pasta al dente release pressure after 2 mins)
Add broccoli, sauteed veggies, lime juice, sugar (if using) and cilantro. Give a mix and close the lid for five minutes. The steam will cook the broccoli.
After five minutes, taste and adjust the seasoning by adding some chili sauce, sugar or salt.