Need tips for cooking a pork loin…

My mother used to cook a pork loin once and a while. I’d alway make sandwiches with it for a week. My mom died four years ago and I can’t find a recipe.

I know she didn’t marinate or dry rub it. Probably barely seasoned it at all. I found one recipe that calls for rubbing it with salt, pepper, and garlic. I’m probably going to do that one since we’re going to be using the leftovers for sandwiches.

My main concern is cooking it. Some recipes say seer each side for 3 minutes before roasting. Some say rub a little olive oil before putting in the over. Some say turn it occasionally so it browns on all sides, other say put a little water on the bottom of the pan to prevent charring.