This is a great snack food, rather like one-dimensional potato chips. If you do it right, you should have your guests holding up twisted little brown crispy squiggles, saying "What is this? Is it mealworms or something? It tastes good, I just want to know if this is bugs or not.".
The only real difficulty is baking time. They take a while to crisp up, and there is only a short window of readiness. Take them out too soon, and they're soft, take them out too late, and they're charred and flavourless... though still edible.
Preheat your oven to about 400F/200C, on the broil setting.
Cut or rip the cooked spaghetti. Don't go nuts, here, you want pieces between three and fifteen centimetres, although a few niblets are okay.
Dump the spaghetti into a bowl and toss with the oil, salt, and other flavourings. You can make all sorts of noodlebits, feel free to experiment. Here are a few suggested additions:
Spread the noodles out on a cookie sheet... two cookie sheets next to each other, if you can fit'em. Don't worry about greasing the sheets, if you put enough oil on, the noodles won't stick.. Try to get the noodles as flat as possible, but don't worry if they overlap.
Now comes the hard part.
You have to wait until the noodles become brown and stiff, which should take at least fifteen minutes, then yank them out before they turn black. You can reach in with a spoon and mix them up a little as they bake, but it shouldn't matter much.
Once the noodles are brown and crispy, you should be able to just push them off gently with a metal spatula. Serve in a bowl, as with chips. The surface of the noodlebits will be a weird bubbly texture, and they should hold their curves.
As with chips, the snacking of noodlebits is quite addictive. Avoid eating them all yourself.