Pre heat oven to 325°F
Add 1 whole plum tomato, cut in half and 1 whole banana pepper to the roasting pan and add enough water to the pan to come up about 1/2 inch from bottom to the sides of the pan, cover tightly with aluminum foil and roast for 2.5 hours.
Check after an hour, if it looks like the pan needs more water, add 1/4 cup at a time and continue roasting for another hour and a half, covered with the aluminum foil.
Remove the foil once the roast is very tender, then baste it generously with the pan juices. Continue cooking for the remaining 30 minutes, bringing the total roasting time to 3 hours. By the end, the roast should be a deep golden brown with richly caramelized edges.
Remove it from the oven and allow to rest for 15 minutes before carving.