In a bowl, mix together the cooked brown rice, garlic, black beans, corn, spices, nutritional yeast, agave, salsa, salt and pepper. Taste the mixture and adjust seasonings accordingly.
Cut off the top parts of each bell pepper and remove the membranes and seeds. Fill each pepper with the rice filling, but do not overstuff.
Pour 1/2 cup of water in the inner pot of the Instant Pot. Place the stuffed peppers on top of a steamer rack and place inside the inner pot.
Secure the lid and select the Pressure Cook or Manual setting at high pressure and reduce the cook time to 5 or 6 minutes (use 5 minutes for medium peppers, 6 minutes for larger peppers).
Once the timer is done, perform a quick pressure release by switching the Pressure Release knob from Sealing to Venting.
Open the lid and spoon some of the Vegan Cheese Sauce or shredded vegan cheese on top of each stuffed pepper. Close the lid for 2 minutes to heat up the cheese. Or, transfer the cheese-topped peppers to an ovenproof dish and place under your oven’s broiler for a few minutes until the cheese has melted.
Sprinkle on some lime juice and chopped cilantro. Serve with salsa of choice.