Creamy Vegan Spinach and Mushroom Pasta

Name: Creamy Vegan Spinach and Mushroom Pasta
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American, Italian
Ingredients: 4 tablespoons olive oil, divided; 1 medium zucchini, sliced; sea salt and ground black pepper, to taste; 4 cloves garlic, minced and divided; 4 cups baby spinach (not packed), divided; ¼ cup pine nuts, soaked for at least 2 hours and drained; ½ cup cooked white beans, drained and rinsed; 2 teaspoons light miso; 1 tablespoon lemon juice; ¾ cup vegetable stock; 1 lb (454 grams) Cremini mushrooms, stems removed and caps sliced; 1 teaspoon tamari soy sauce; 1 lb (454 grams) pasta; vegan parmesan ((for serving))