Select "saute" and add the butter.
When butter melts, add the onion and cook till it's soft.
Add the carrot and the peppers and keep stirring and cooking till they are soft as well.
Add the ground beef. Mix it and cook till all the beef is brown.
Add the couscous and mix for 2 more minutes.
Close the lid and cook at high pressure for 6 minutes.
After cooking ends, do a quick pressure release.
Open the lid and fluff the couscous with a fork.
Add salt and pepper to taste and enjoy!