How much cardio while on a lean bulk

Howzit guys,
I'm currently on a lean bulk and it's going pretty well.
fat increase seems to be at a reasonable pace for a lean bulk but,
I'm wondering if I could keep the fat down even more by adding in cardio?
when would be the best time to do cardio and what alterations should I make to my diet if I include cardio?
thanks in advance for any input

just toss it in x2-3 per week for 20mins post workout.

would that be the same as doing it in the morning before breakfast?
thanks.

Cardio before breakfast is even better! Then if you have a weights session afterwards you will fire up your metabolism twice in one day.

awesome. I'll start putting cardio in 2-3 times per week before breakfast.
if I do my cardio after weight training, do I wait until after cardio to have my shake?
thanks guys .

Yes bro