1. Heat oil in a large skillet and brown the meat and onions. Add in the celery and spices and stir well. Pour in the tomato sauce, stewed tomatoes, and marinara sauce, together with the crushed garlic. Stir well. Cover stew and cook over low heat for 20 minutes. Add carrots and potatoes and stir well again.
2. Preheat oven to 325 degrees Fahrenheit (170 degrees Celsius). Transfer your skillet to the oven (or you can transfer the stew into a 9×13-inch pan) and bake an additional two hours.