Creamy Zucchini Spaghetti

Name: Creamy Zucchini Spaghetti
Ingredients: 8 ounces whole-wheat spaghetti; 1 tablespoon extra-virgin olive oil , divided; ¼ cup plain dry whole-wheat breadcrumbs; 2 teaspoons salt-free Italian seasoning , divided; 2 teaspoons grated lemon zest; 1 small yellow onion , finely chopped (about 1 cup ); 6 medium cloves garlic , minced (about 2 tablespoons ); 1 medium zucchini , thinly sliced into half-moons (about 2 cups ); ½ teaspoon salt; ¼ teaspoon ground pepper; ¾ cup heavy cream; 6 tablespoons grated Parmesan cheese; 2 tablespoons lemon juice; Fresh basil leaves for garnish (optional)