INGREDIENTS
1 pound trenette, trofie or any of the substitute pastas listed above
1 pound large red potatoes, peeled and cut into 1/2-inch cubes
1 pound green beans, trimmed and cut into 1 1/2-inch pieces
1 cup fresh basil pesto (Pesto alla genovese -- recipe here)
Fine sea salt, to taste
Freshly ground black pepper, to taste
Freshly squeezed lemon juice, to taste (1 to 3 teaspoons, from 1 lemon)
1-2 tablespoons unsalted butter (optional)