This baked pasta dish is a simple meal you can quickly make and serve any day of the week. Baked in individual ramekins, it's particularly well-suited to a casual dinner party.
Heat oven to 500°F. Bring a large pot of salted water to a boil. Add pasta and cook for 4 minutes. Drain in a colander.
While pasta is cooking, combine cream, tomatoes, mozzarella, Pecorino Romano, fontina, Gorgonzola, ricotta, 1/4 teaspoon salt and basil in a large bowl. Stir to combine. Add par-cooked pasta to cheese mixture and toss to combine.
Divide among 6 to 8 individual, shallow, ceramic gratin dishes (1 1/2 to 2 cup capacity). Dot with butter and bake until bubbly and brown on top, 7 to 10 minutes. Sprinkle with Pecorino Romano and scallions. Serve immediately.