In a medium saucepan, bring the water to a boil. Add the couscous, 1 teaspoon olive oil, and 1/2 teaspoon sea salt and stir. Cover, remove from the heat, and let stand for 5 minutes.
Fluff the couscous with a fork, transfer it to a large bowl, and toss it with the remaining 1 tablespoon olive oil, 1/4 teaspoon sea salt, garlic, lemon zest, lemon juice, parsley, and pine nuts.
Transfer the mixture to a serving platter and garnish with additional pine nuts, parsley, and red pepper flakes, if desired.