Peel and rinse the shrimp. Next, boil them in salted water. Cut the squid into rings about ½ centimeter thick. Peel the onion, rinse and cut into small cubes. Grate the cheese on a coarse grater and place in a separate bowl.
Heat a frying pan, add butter and add all the squids. Fry them over medium heat for about 5 minutes. Add shrimp to squid and fry for another 3 minutes.
Next, add the onion and fry everything together for about 3 minutes. Pour coconut milk into seafood and stir. Sprinkle everything with cheese and simmer for 5 minutes with the lid closed over low heat. Serve the dish immediately.
Serve the dish in a deep plate. Pour some creamy sauce over the seafood. Cut lemon wedges and garnish seafood with them. Take some greens: dill or parsley and also decorate the dish with it. If desired, serve a vegetable salad or cook any cereal, such as rice or buckwheat porridge.