1. Place the parmigiano reggiano into your Cuisinart Custom 14 Cup Food Processor and pulse until the cheese becomes a fine powdery texture. Place into a bowl and set aside.
2. In your Cuisinart Custom 14 Cup Food Processor add basil, garlic, and pine nuts. Pulse until well combined. Then add parmigiano reggiano, salt, pepper, and lemon juice. Pulse and begin to drizzle in extra virgin olive oil until it reaches your desired consistency.
3. Bring a large pot of heavily salted water to a boil. Add the potato slices and cook for 3 minutes. Then add the green beans and cook for an additional 3-4 minutes or until both the potatoes and green beans are slightly tender. Remove the potatoes and green beans and place into a bowl set aside. (They will continue cooking a bit from the residual heat – be careful not to overcook the potatoes during this step)
4. Add the pasta to the boiling water and cook until al dente according to package instructions. Be sure to reserve ¼ cup of pasta water.
5. Once the pasta is done, strain and immediately transfer to a large mixing bowl along with the potatoes, green beans, and butter. Pour the pesto overtop and gently stir to combine, adding the reserved pasta water only if/as needed. Once thoroughly coated, serve, top with additional parmigiano reggiano and garnish with a sprig of fresh basil. Enjoy!