1. Put a little vegetable oil in a skillet. When heated, add a pinch of dry mustard and cumin seed. Allow seeds to heat until they begin to pop.
2. Thinly slice onion and potato. Sauté in same skillet.
3. Add mixed sliced vegetables and continue to sauté.
4. Begin adding remaining spices, sprinkling 1/2 teaspoon of each (less of the red pepper if you do not like your food too spicy).
5. Once vegetables are lightly cooked and coated with spices (the mix will look yellow by now), add some tomato sauce and simmer a few minutes more.
