Place roast in slow cooker. Add water and spices and diced can tomatoes, turn on to 300° or med heat. Simmer for about 2 hrs. Add Italian sausage links (optional). Simmer another hour or until roast is super tender.
When roast is done remove liquid to bowl and skim off fat. Add about 1 c of hot liquid to sauce pan and 1/4 c of flour and whisk together, make sure all lumps are removed. Add remaining liquid, I had about 2 c of liquid. Now in bowl mix together 2 tbsp of tomato paste and another cup of water. Add to sauce and stir in well. Let simmer about 5 min. Add salt to taste.
Place roast over pasta or garlic bread and spoon on sauce.