In a large saucepan, heat oil over medium heat. Add onion and cook 4 minutes. Add carrots and cook another 4 minutes. Add potatoes, cover, and cook 5 minutes. Stir in garlic, ginger, turmeric, salt and pepper, cook 1 minute then add water and cook 3 minutes more. Add jalapeno and cabbage and stir to mix for 2 minutes. Cover and cook, stirring occasionally, until vegetables are soft. About 5-10 minutes being careful not to burn.