Boil pasta as per package instructions. Wash and soak 1/2 cup red lentils - masoor daal. In a small pressure cooker, heat some olive oil and add 1/4 chopped onion, 1 celery, 1 carrot, 1/2 green pepper and 2 cloves of garlic. Sauté for a few minutes. Add salt, pepper, red chilli flakes, oregano, and a pinch of thyme and marjoram. Add big pieces of mushrooms and the lentils and sauté for another minute. Add half jar of basic tomato basil pasta sauce, about 1/2 cup water and cook on medium for two whistles. Once done, mix the pasta, lentil sauce, the remaining half jar of the tomato sauce and some reserved pasta water. Serve with olive oil and grated permesan. https://www.kitchentreaty.com/red-lentil-marinara-sauce/