Preheat your oven to 375°F (190°C).
Cook the pasta according to package instructions until al dente, then drain.
In a large skillet, heat the butter and olive oil over medium heat. Add the garlic and red pepper flakes, sautéing until fragrant.
Add the shrimp to the skillet, seasoning with salt and pepper, and cook until they turn pink, about 2-3 minutes.
Mix in the cooked pasta, lemon juice, lemon zest, and half the parmesan cheese.
Transfer the mixture to a baking dish, sprinkling the remaining parmesan cheese on top.
Bake in the preheated oven for 15-20 minutes, or until the top is golden and bubbly.
Garnish with fresh parsley before serving.