When I sit, I sit for 15 minutes at a time being less than a month old to Zazen. Without fail, at minute 12 or 13 the tingling in both of my feet has become so intense that I generally spend the last 2 minutes sitting in more of a sprawled out position instead of with legs crossed.

Is there a trick to not having my extremities fall asleep while sitting?

Gassho,
Phil