Prepare pasta according to package directions, drain. Heat oil over medium high heat in a large, heavy pan. Add meat and garlic and brown lightly. Add seasonings and stir to coat meat. Add tomatoes and water. Bring to a boil, then reduce heat, cover and simmer 1 and a half hours, stirring occasionally. Add cold water to cornmeal and stir to make paste. Stir into hot beef mixture. Continue to cook and stir for 20-30 minutes uncovered until desired consistency. Serve over hot pasta.