In a large resealable plastic bag, combine flour and 1/2 teaspoon pepper. Add beef, a few pieces at a time, and shake to coat.
In a Dutch oven, brown beef in 2 tablespoon oil; drain. Remove and set aside. In the same pan, saute the zucchini, onion, celery and carrots in remaining oil until tender. Add the garlic, oregano, basil and marjoram; cook 1 minute longer.
Add wine, stirring to loosen browned bits from pan. Return beef to pan; add the tomatoes, broth, sugar and remaining pepper. Bring to a boil. Reduce heat; cover and simmer for 1-1/2 hours or until beef is tender. Add tortellini and spinach. Return to a boil. Cook, uncovered, for 7-9 minutes or until tortellini are tender. Yield: 6 servings (2-1/4 quarts).