Preheat oven to 350 degrees. Season pork on one side with salt and pepper. Heat a stainless steel or cast iron pan with vegetable oil to medium high heat. Sear the seasoned side of the meat first. While that side is searing, season the opposite side. When the meat is brown and caramelized on both sides, remove from pan and put into a shallow casserole dish. Let the pan cool slightly and turn the heat to low-medium (about 3). Melt the butter and add the garlic. Cook for one minute. Then add peaches, cayenne, vanilla, sugar, and cinnamon. Cook the sauce just to get the juices flowing out of the peaches and to pick up the yummy bits from the pan. Pour over the roast and then cover with foil. Cook for about an hour or until the roast is cooked through. Let it rest for at least 15 minutes before slicing.