Place chicken quarters (legs & thighs) into a crockpot early in the day.  It's fine if they are still frozen. Cover just barely with water, salt to taste and bay leaves. Turn the crockpot on low and go to work (or carry on your normal day's activities).

 

In the evening, turn off the crockpot. Remove chicken from the crockpot and discard skin and bones. In a deep pot, heat olive oil. Add onion and garlic and cook until the onions are translucent. Add tomato sauce and stewed tomatoes, the chicken and about a cup of the chicken broth from the crockpot. (If you add too much broth, the sauce will be too soupy; if you add too little, the chicken taste will be a bit weak.) Stir, cutting up the whole tomatoes. Add spices, and onion/celery mixture. Cook, stirring occasionally. Cook spaghetti according to package directions. Mix noodles with sauce, and serve with grated Parmesan cheese on the side.