In a 4-cup measure micro-cook onion and butter or margarine, uncovered, on 100% power 1 to 1 1/2 minutes or until onion is tender but not brown. Stir in tomato sauce, dried basil, dried thyme, and freshly ground pepper.
Micro-cook, uncovered, on 50% of power for 4 to 6 minutes or just till boiling. Stir in the water and instant chicken bouillon granules.
Micro-cook, uncovered, on 100% power for 2 to 3 minutes or till the mixture is heated through. Serve with the Parmesan Croutons.