Here's a little wallet-friendly and delicious technique we employ chez English when we've a glut of pasta left-overs: we put 'em in a frittata.
Simply whisk together some eggs and a bit of milk, add the pasta, put the whole concoction in a buttered/oiled ovenproof saucepan, and cook over medium heat until the filling is set. Next, scatter some cheese of your choosing over the top, place the pan under the lowest broil setting of your oven and cook until the cheese is golden-brown. Allow the pan to cool slightly and then slice wedges, plate them and serve.
That's it. Easy on the taste buds and the benjamins.