Cook the pasta according to package instructions, meanwhile...
Pulse the garlic in a food processor, just until minced and sticking to the sides.
Add the pine nuts, basil, salt & pepper. Process until the ingredients stick to the sides.
Use the feed tube of the food processor to add the arugula and olive oil in turns, about ¼ at a time, pulsing in between. Add enough olive oil to gain the consistency you prefer and to allow the arugula to move freely in the processor.
Taste the pesto and add additional salt & pepper, as desired.
Toss the finished pesto with the fresh pasta. If desired, top with toasted pine nuts and sprouts of your choice.