Easy Vegan Lentil Loaf

Ingredients
▢1 cup red lentils, uncooked
▢3 cups chestnut mushrooms , finely chopped
▢1/2 medium aubergine, finely chopped
▢1 medium onion , finely chopped
▢1 large carrot , finely chopped
▢1 large red bell pepper , finely chopped
▢3 stalks celery, chopped
▢2 tbsp tomato purée
▢1/2 tsp black pepper
▢2 tbsp cranberries, chopped
▢3 cloves garlic, minced
▢1 small bunch cilantro, chopped
▢1 tbsp ground flaxseed
▢sea salt, to taste
▢2 tbsp buckwheat flour