Italians are known to use leftover pasta as a filling for frittatas. In this recipe, we use spaghetti or bucatini (a tubular pasta similar to spaghetti) for a frittata enriched with cheese and seasoned with parsley and thyme. For the best flavor and texture, we used two kinds of cheese: Parmesan for its salty-sweet nuttiness and sharp or extra-sharp white cheddar for its creaminess. Gruyère is a good alternative to cheddar.