Note - If you have the time, letting pork rest at room temp for 20-30 minutes will reduce cooking time.
Preheat oven to 525°F
Line a roasting pan with aluminum foil and spray with cooking spray.
Place pork roast in pan, sprinkle with kosher salt.
Cook (uncovered) at 525°F for 30 minutes.
Reduce heat to 400°F and cook (uncovered) until temperature of thickest part of roast (center) reaches 145° - 160°. This is truly a matter of preference. Pork is safe to eat when cooked to 145°F - I cook to 145°F. Depending on size of roast & desired doneness - plan on cooking at 400° for 20 - 40 minutes.
Let pork rest for 10 - 15 minutes. Slice, serve & enjoy :)