1.Preheat oven to 350 degrees. In a small bowl, stir together salt, pepper, cumin, chili powder, and cinnamon, then coat the pork with the spice rub.
Heat the oil in an a large, ovenproof skillet. Heat the oil until rippling, and brown the pork, about 2 minutes per side. Leave pork in the skillet. If you don’t have an ovenproof skillet, brown the pork in a skillet and transfer it to a 9x13 foil-lined baking pan.
Stir together the brown sugar, garlic, and Tabasco and pat on top of each tenderloin.
Roast in the middle of the oven until a thermometer inserted diagonally in center of each tenderloin registers 140, about 25 minutes. Let pork stand in the skillet at room temperature for 10 minutes. The temperature will rise to about 155 while standing.
Slice on the diagonal and serve, spooning the sauce from the skillet on top of the pork.