SAUCE:
In a 2-quart saucepan, cook the onions and garlic in hot oil until tender but not brown. Add tomato sauce, sugar, and the 1 tsp oregano, thyme, and bay leaf. Bring to boil; reduce heat. Simmer, uncovered, for 20-25 minutes or until thickened. Remove from the heat and remove the bay leaf.
Meanwhile, cook the manicotti shells as the package directs. Drain shells and rinse with cold water.
FILLING:
Stir together eggs, ricotta, parmesan cheese, parsley, and the 1/2 tsp of oregano and pepper, and half of the mozzarella cheese. Carefully spoon the filling into the manicotti shells.
Pour half of the sauce mixture into a 2-quart baking dish. Arrange the stuffed manicotti in the baking dish. Pour the remaining sauce on top of the shells. Sprinkle the rest of the mozzarella cheese atop. Bake, covered at 350°F for 35-40 minutes