Sauté the Vegetables: In a large pot, heat a little olive oil over medium heat. Add the chopped onion, celery, carrot, red pepper, green pepper, garlic, and leek. Cook for about 5 minutes until the vegetables begin to soften.
Add the Potatoes and Flour: Stir in the diced potatoes and cook for another 2 minutes. Sprinkle the flour over the vegetables, stirring well to coat everything evenly.
Add the Broth: Slowly pour in 200ml of vegetable broth while stirring to prevent lumps from forming. Once combined, add the remaining 1.5 liters of broth. Bring the soup to a boil.
Simmer and Season: Reduce the heat to low, season with salt and black pepper, and let the soup simmer for 15-20 minutes or until the potatoes are tender.
Add the Noodles: Stir in the noodles and cook according to the package instructions until they are tender.
Garnish and Serve: Sprinkle dried parsley over the soup before serving. Enjoy warm.