Preheat the oven to 400°F. Spray a 9×13 pan with nonstick spray.
Cook the pasta as directed on the box; scoop out ½ of the starchy water to set aside, then drain the pasta, rinse and spread out along bottom of prepared pan.
Heat the oil in a large skillet over medium heat. Add the minced garlic and sauté for 30 seconds. Add the tomatoes and ¼ cup parsley, reduce heat, and simmer for 10 minutes. Add the shrimp; cover and cook for 5 minutes. Scoop the mixture on top of the pasta in the dish, and sprinkle with feta cheese.
Bake for 10 minutes. Sprinkle with ¼ cup parsley and lemon juice. Add salt and freshly ground pepper to taste.