Turn on the Instant Pot and select the 'Sauté' setting. Add the olive oil and brown the sausage pieces on both sides. Once browned, remove the sausage and set aside.
Add the garlic and diced yellow onion to the pot. Sauté until the onion turns soft and translucent. Then add the celery and green bell pepper, cooking for about 5 minutes.
Remove the bay leaves. Take about 1 1/2 cups of the bean mixture and mash it until smooth; then stir it back into the pot. Add the salsa, chopped parsley, and browned sausage.