Inspired by the Gamelin thread
Solution 1
Low level attacks by armored / fast assault aircrafts, either Breguet 693 or Il-2 (think Kursk)
Solution 2
Large fighter bombers, either Typhoon with rockets or P-47 with bombs (as in Normandy)
Solution 3
Low altitude heavy bombing by waves of B-17s and B-24 (operation Cobra, in Normandy, 1944)
Solution 4
Massive dive bombing (Stuka style)
I do know that most aircrafts didn't existed in 1940. I used them as practical examples of what can be done to crush a panzer division by air power.
Pick your favorite. discuss.