Creamy Avocado Pasta | Must Try

Ingredients
2 avocados, ripe
300g (10.58oz) spaghetti
2 tablespoons fresh lemon juice
3 tablespoons olive oil
1/4 cup pine nuts + for topping
1/4 cup fresh basil
2 garlic cloves, crushed
1/2 teaspoon salt
1/4 teaspoon freshly ground black pepper
Parmesan (optional)