Put trimmed green beans and sliced mushrooms in a gallon ziploc with 2 Tbs each of olive oil and balsamic vinegar. Shake to coat, then spread evenly on a rimmed baking sheet. Roast at 450 for minutes, then sprinkle with kosher salt, pepper and parmesan.
We usually eat for taste not for low calorie. If we don’t get taste most probably most of the people will stop eating as we don’t like eat something tasteless. But we cannot kept on eating everyday tasty and yummy dishes as it is no low calorie foods