In a saucepan prepare the pasta according to package instructions. Drain and retain a half of a cup of the pasta water.
Heat a sauté pan over medium heat add the pine nuts. Toast for 5-7 minutes or until the sides of the pine nuts start to brown. Make sure to stir or toss often. Remove them from the pan and set aside in a bowl.
In the warm sauté pan heat the oil over medium high heat and add the tomatoes. Once the tomatoes start to blister and burst, about 5-8 minutes, add the garlic and cook for an additional minute.
In a mixing bowl combine the pasta, tomato and garlic mixture, pine nuts, lemon juice, lemon zest, and pesto. Gently stir to coat all of the pasta. Add pasta water a tablespoon at a time to get a nice smooth sauce to coat the pasta. You won't need very much.
Notes
For additional protein or to make this pasta a meal feel free to add chicken, shrimp, or salmon to the dish. Store in an airtight container in the refrigerator for up to 3 days.