Heat a frying pan that has been sprayed with oil.
Add onion, carrot, sweet potato and garlic, stirring until vegetables are tender.
Add zucchini, capsicum, curry powder, soy sauce and stock, keeping 1/4 cup stock in reserve.
Bring to the boil and simmer for 2-3 minutes.
Add kidney beans and pasta sauce and simmer for 5-10 minutes.
Dissolve protein powder in the reserved stock and stir through.