Bring a large pot of heavily salted water to a boil. Add pasta and cook according to package directions. Drain and set aside.
Meanwhile, make the pesto by combining basil, pine nuts, avocados, lemon juice, garlic in a food processor. Process until smooth and season to taste with salt and pepper.
Toss pasta with pesto dressing in a bowl. Divide pasta among serving bowls and garnish each serving with a basil leaf. Enjoy!