Shrimp Scampi Risotto

Name: Shrimp Scampi Risotto
Ingredients: 3 tbsp. butter; 1 large onion, diced; 4 cloves garlic, minced; 1 c. arborio rice; 1/2 tsp. kosher salt; 4 c. low-sodium chicken broth; 1 1/2 c. dry white wine; 1 lb. medium shrimp, peeled and deveined; Juice of 2 lemons; 2 tbsp. chopped fresh parsley, plus more for garnish; 1 tsp. crushed red pepper flakes; 1 c. freshly grated Parmesan