1. In a plastic bag, combine flour, salt and pepper. Add beef cubes, a few at a time, Shake vigorously to coat.
2. In skillet, brown meat quickly in hot oil. Add onion, garlic and oregano; cook until onion is tender but not brown.
3. Transfer to crockpot. Add water. Cover and cook on low-heat setting for 8 to 10 hours. Turn crockpot to high-heat setting.
4. In strainer, rinse peas under hot water to separate; stir into beef mixture with ravioli and parsley. Cover and cook until heated through, about 30 minutes longer.