I'd buy beans instead. Cheaper and healthier. Mexican bean salad in particular is really good. If you insist on ramen I'd use raw noodles, put in your fill or chili powder and veggies. For the "meat" use tofu and mushrooms.
If you use real yakisoba noodles that are made from buckwheat flour, it has the advantage of decent fiber and protein (a complete protein, like soy), but not as many vitamins as beans.