Pesto tagliatelle alla Genovese

Preparation time: 30 minutes.
Cooking time: 25 minutes.
Ingredients for 4 people:
- 400g of tagliatelle
- 200g of potatoes
- 200g of French green beans
- 75g of basil leaves
- 3 cloves of fresh garlic
- 30g of pine nuts
- 50g of grated pecorino cheese
- 50g of grated parmesan
- 1.2dl of olive oil
- Butter
- Salt, pepper
Preparation:
1. Blend the garlic cloves, basil and pine nuts in a food processor.
2. In a bowl, add the olive oil and the pecorino.
3. Season with salt and pepper.
4. Peel the potatoes and cut into cubes of about 2cm.
5. Remove any strings from the beans and rinse them.
6. Cook the potatoes in boiling salted water for 10 minutes.
7. Add the beans and leave to cook for a further 7 minutes.
8. Add the tagliatelle, and cook.
9. Retain 1dl of the vegetable water and add it to the pesto.
10. Stir well.
11. Drain the tagliatelle and the vegetables; add a little butter and the pesto.
12. Stir together and serve with grated parmesan on the side.