Chop suey was initially made using vegetables only. Chop suey vegetable is a delicious main dish that can be easily prepared in a slow cooker. For making chop suey, the ingredients required include oil, shredded cabbage, sliced onions, salt, boiled noodles and shredded French beans. The ingredients required for making the sauce include vinegar, tomato ketchup, soy sauce, sugar, corn flour and worcestershire sauce.