Bring water to a boil in a pan, add salt and oil.

Add spaghetti and cook until soft, but not mushy.

Chop onion, carrot, bell pepper, and cabbage while the pasta cooks.

Drain the spaghetti and rinse with cold water.

Heat oil in a pan, add onion and saute until translucent.

Add chopped vegetables and saute for about a minute.

Sprinkle a little water and cook until the vegetables are tender-crisp.

Add cooked spaghetti, salt, black pepper powder, and Italian seasoning.

Toss well to combine.

Serve hot.