This is what I would do. Do you have a tiller or access to a tiller? As soon as it's dry enough, I'd get in there and till it up, remove as many of the rocks as you can.
Then, I'd lay down a deep layer of mulch: second cut hay, straw, leaves, grass clippings. Aim for a layer that is at least 3" deep. You can then plant crops which will take a while to mature. I would not plant any short season crops there which you would eat "raw".
The general recommendation is that pathogens can survive in manure that has not been hot composted for anywhere from 120 days to a year. I am comfortable with the 120-day statement. By putting down a deep mulch, the risk of pathogen spread would be greatly decreased.
If this were my garden, I'd be comfortable planting squash, melon (be sure to wash it well before cutting it) tomatoes (preferably paste tomatoes which would be washed well before canning) pole beans (they get cooked before eating, and do not contact the ground the way bush beans do). I'd put any greens, cucumbers, root crops, and any other veggies which are typically consumed without cooking in another area.