I made this recipe found here...
http://po.st/QYWmvh from 12 Tomatoes using my Instant Pot pressure cooker. I went one hour on high pressure using a bone-in butt instead of a slow cooker. This balsamic sauce really makes this recipe. It is a keeper and so good! I served them on King's Hawaiian rolls.
And those are edamame and snap peas served on the side...