The way i cook up tenderloins..
Get a good cast-iron pan..add vegetable oil
Get it good and hot...add peppers,onions,mushrooms
Add tenderloins...I then use my garlic/sea salt grinder and grind it over tenderloins generously...let it cook in all those vegetables
Add additional salt/pepper to desire...don't over cook the tenderloins and enjoy!
Boy am i hungry now!