When salmon is almost finished, start preparing the zucchini noodles. In a large skillet, heat 1 tablespoon olive oil over medium heat. Add zucchini noodles, garlic, salt, crushed red pepper, and black pepper, sautéing for 3 minutes. Add a few tablespoons water and heat another minute or so. Noodles should have the firmness of al dente pasta. Mix in parsley and the remaining half of the lemon juice.