Sauté the finely chopped garlic and onion in a splash of olive oil. At the same time, heat a pot of salted water.
Beat some eggs with Parmesan cheese, salt and white pepper. Then set aside.
When the onion has taken on some colour, add the chopped parsley and the shrimp. Season to taste and sauté for 1 minute. Then add the cream. Lower the heat and let the mixture simmer.
Add the macaroni to the boiling water and cook until al dente.
Drain the pasta and add them to the pan with the shrimp. Mix everything well and transfer to an oven dish.
Spread the egg mixture on top of the macaroni and sprinkle with the breadcrumbs and the grated Emmental.
Grill the macaroni until the cheese and breadcrumbs turn golden brown. Remove the from the oven and bring them to the table.