^^ I went ahead and made this beef stew recipe tonight and it was a big win! In addition to adding potatoes and fresh rosemary I also changed it by browning the beef first, sauteeing the onions with some garlic, and adding some tomato paste and 1/4 cup of beef broth. I also thickened it with a slurry of corn starch and 1/4 beef broth at the end instead of the tapioca. It was really delicious and so easy.
I thought I'd post a follow-up to my original question. I bought the Joule sous vide machine and tried it out for the first time tonight with boneless, skinless chicken breasts. They came out perfectly and were the moistest chicken breasts I've ever made. Love it!