Beef Stew Italiano

2 1/2 pounds beef stew meat -- cut into 1" cubes
4 carrots -- cut into 1/2" pieces
1 large onion, thinly sliced, separated into rings
1 28 oz can whole tomatoes -- cut up
2 cups water
1 teaspoon salt
1 1/2 teaspoons Italian seasoning
2 teaspoons instant beef bouillon
1 cup uncooked mostaccioli or other pasta

Brown meat in slow cooker (or in skillet is easier) on top of range or skillet on medium heat. Transfer pot to base or meat to slow cooker. Add remaining ingredients except pasta to cooking pot. Stir to combine. Cover and cook on low setting for 7 - 9 hours (OR high for 3 - 4 hours). Increase heat to high. Add pasta and stir to blend. Cover and continue cooking for 30 minutes until pasta is done.