I made beef stroganoff in my IP a few weeks ago. I took things from various recipes, but the basic method worked really well. Saute the meat, add flour and broth and some other stuff (I used wine and worcestershire sauce) and cook under pressure. Then open the pot, add noodles and cook under pressure again. It really made it flavorful. Add sour cream at the end. I sauteed mushrooms first, then removed them and added some back at the end. I'm not a fan of mushrooms, but the flavoring from them is fine.
I had tried crock pot beef stroganoff once and it didn't taste great and it looked gross. The IP version was really good and dh liked it too.