I think this is something best answered by your physiotherapist. It really depends what your injury is, where any instabilities are, and so on. What worked for me to recover from an MCL tear is not necessarily good for someone who's having ACL surgery or getting a meniscus problem fixed.
However, for recovery, your body is going to need quality protein and fat. I'd make sure you're eating lots of nutrient-dense foods, bone broths, eggs, good meats, and so on.