Sauté the Vegetables: Heat the olive oil in a large pot over medium heat. Add the diced red onion, garlic, carrot, and celery. Sauté for about 5-7 minutes, stirring occasionally, until the vegetables are softened.
Deglaze with Wine: Pour in the red wine, stirring well to deglaze the pot. Let it simmer for 2-3 minutes to allow the alcohol to evaporate, and the flavors to concentrate.
Add Tomatoes and Stock: Add the crushed tomatoes and two can measures (about 800ml) of plant-based chicken stock to the pot. Stir to combine.
Incorporate Lentils and Walnuts: Stir in the red lentils and finely chopped walnuts. The lentils will add a rich texture, while the walnuts give a hearty, "meaty" bite. Mix everything thoroughly.
