Bring a large pot with water to boil. When the water is boiling add 2 Tbsp sea salt and the pasta. Set the timer following the cooking instructions on the packaging.

Reserve 1 cup of starchy boiling water from the pasta. Set aside.

In a skillet add 3 Tbsp olive oil and the onion. Cook 2 min at medium heat.

When the onion is golden add the zucchini, season with 1/2 tsp sea salt and cook for 5 min to let the zucchini release their water and reduce into a creamy texture.

In a large bowl combine pasta + zucchini + feta cheese + mint + balsamic vinegar. Stir to combine well. Add also some boiling water you reserved from the pasta pot, as much as you need to get a creamy sauce. Serve warm.