To make pesto:
Combine basil, garlic, pine nuts, and olive oil in food processor. Process until will mix. Scrape down sides and process until smooth.
Place in regular bowl and stir in cheese, salt, and pepper.
As served:
Make pesto.
Marinate shrimp for at least a couple of hours.
Cook pasta (according to directions).
While pasta is cooking, grill shrimp for 5-7 minutes or until shrimp is pink. Time will depend on grill heat and size of shrimp.
Remove heat from grill and top with juice from one lemon.
Drain pasta and combine with shrimp,tomatoes, and a small drizzle of olive oil.
Serve on a bed of fresh arugula topped with more lemon juice and cracked pepper.