Yup, just do what you normally do, but lighter weight to get a feel for it again. You can increase the weight the following week if you want. Besides that, if you feel you can't work your quads without really hammering them, do a few sets on the leg press, do some leg extensions or even some lunges. Either one should be pretty safe to work with. Take this oppurtunity to perfect your squat form with light weights and when you're all healed and ready to squat hard, it will skyrocket.