Peel and chop the onion. Cut the zucchini in medium-sized cubes.

Heat some olive oil in a pan. Add the onion, and after 1-2 minutes add the zucchini. Let it cook for 7-8 minutes.

Add the tomatoes (with the juice from the can), and crumbled tofu. Let it cook for about half an hour.

Add crumbled feta or ricotta and mix.

Serve with pasta.