Shrimp Scampi Bisque

Name: Shrimp Scampi Bisque
Ingredients: ½ cup extra-virgin olive oil, divided; 2 lb. large shrimp, peeled, deveined, cut into ½ pieces, shells reserved; 3 medium onions, finely chopped; 1 large russet potato (about 14 oz.), peeled, cut into 1 pieces; 3 celery stalks, chopped; 2 medium carrots, peeled, chopped; 16 garlic cloves, 10 smashed, 6 thinly sliced; 2 bay leaves; ⅓ cup double-concentrated tomato paste; 1 cup dry white wine; ½ cup cognac; 8 cups low-sodium vegetable broth; ½ cup heavy cream; 1½ tsp. Diamond Crystal or 1 tsp. Morton kosher salt, plus more; Freshly ground pepper; 1 lemon; 2 Tbsp. unsalted butter; ¼ cup finely chopped parsley