Line a 13 x 9 inch baking sheet with foil (for less mess) and then spray with cooking spray, or brush with olive oil. In the center of the pan, shape the mixture into a loaf that is about 1-1/2 inches high, 6 inches wide and 12 inches long. Bake uncovered at 350F for 25 minutes, then raise heat to 400F. Continue cooking until done, about 30 minutes longer.
Add the tomato topping during the last 5 minutes just enough to heat the topping. Serve immediately.
Adjust the number and/or type of chiles to suit your desired level of heat.