In the theme of simple dishes with pasta, I think this is the most simple in absolute. Is a dish of Liguria (Genova), but is now generally known all over Italy, and well used in the midnights, when you and some friends have a certain appetite.....
Spaghetti aglio, olio e peperoncino (garlic, oil, and red pepper)
Use dry spaghetti, and cook them in boiling water for about 8 minutes.
In a little pan heat Extra virgin olive oil (two- three spoons a person) and add some thick slices (3 mm about) of garlic and a little dry red pepper crushed in the fingers. DON'T TOUCH YOUR EYES!!!
When garlic is light brown , serve pasta with this oli, and add a generous portions of parmisan or pecorino cheese.