Insert knife to remove stem with the seeds. Discard the seeds and save the stem. Repeat with all peppers.
Make the Filling
Mix remaining ingredients except sour cream in medium bowl until well combined.
Stuff Peppers & Cook
Stuff each pepper with rice mixture and, place 3 at a time, in Smart Multi-Cooker Shielded Colander. Add 400 mL/1¾ cup water to base/water reservoir. Place Shielded colander inside base and cover. Microwave on high power for 10–12 minutes. Repeat with remaining peppers and serve with sour cream and additional cheese if desired.