soak the lentils
Add dried lentils to a bowl. Cover with water and set aside overnight.
cook the sauce
Place a large skillet over medium-low heat. Add olive oil and diced vegetable. Saute for 5 - 8 minutes until the vegetable softens. Increase the heat, add tomato paste, thyme, oregano, and bay leaf. Saute for another 2 minutes, then add the drained lentils, tomato passata, and water or vegetable broth. Cover with a lid, lower the heat to medium-low, and cook for 45 minutes or until the lentil is cooked.TipFeel free to use canned lentils. In that case, cook the lentils for 15 minutes. If you don't soak the lentils beforehand, then the cooking time will be longer. Cook the lentils for 1 hour and 15 minutes, and add 300ml (1 1/4 cup) water more.
Season your lentil bolognese to taste with salt and pepper. Sprinkle with diced fresh parsley and divide between six plates. Serve with your favorite side dish.