Back to what Knott said, your resting metabolic rate goes up after a significant injury because you're cellular activity is increased as you body is trying to repair the damage. I like the analogy of a house. How much work goes into maintaining a house, versus doing a big remodel.

So eat healthy but eat as much as you like. Lots of fluid is good, liquid is the medium in which our cells function and allows for proper nutrient transport etc. Vitamin C is very important for the healing of all kinds of soft tissues, that includes ligaments as well as joint capsules and you already got good advice on protein and calcium.

It's also a good idea to fuel on foods with lots of antioxidents in them like lph said, teas, dark chocolate, dark fruits and veggies, esp berries.

Take good care of yourself.