Lentil bolognese

Name: Lentil bolognese
Ingredients: 2 tablespoons olive oil; 1 onion (chopped); 2 carrots (diced); 2 sticks celery (chopped); 2 cloves garlic (finely chopped); 1 tablespoon miso paste (or marmite (yeast extract) optional); 1 tablespoon tomato purée; 3 sundried tomatoes (chopped, optional); 1 teaspoon dried oregano or mixed herbs; 800 g tinned chopped tomatoes (2 standard tins); 300 g split red lentils; 500-750 ml vegetable stock; 1 teaspoon salt (or to taste); Freshly ground black pepper; 1/2 lemon (juiced); Handful flat leaf parsley (chopped)