Steps 1-3 are optionalbut will add additional depth of flavor. If you chose to skip these steps, simply add these ingredients into the Instant Pot (in Step 4). Set Instant Potto sauté setting.
Sauté onion in butteror oil for about 3-4 minutes until golden brown.
Add garlic and sautéfor about 1-2 minutes (be careful not to burn garlic).
Add onion, garlic,butter or oil, Arborio rice, water, boullion cube, rosemary and shiitake mushrooms to instant pot.
Cook on high pressure setting for 6 minutes.
When machine beeps, full release pressure (quick release).
When all pressure is released and you can remove lid from instant pot, remove lid and stir in cheddar cheese.
Transfer to bowl and serve immediately.