Once the
pasta gets added it may need a
little extra
liquid to coat the noodles evenly, and the perfect
liquid for that job is the starchy, salty water you just
cooked the
pasta in.
4 Before draining the spaghetti, scoop out a
little pasta -
cooking liquid and reserve, then toss the drained
pasta into the bowl of tuna, scallions, etc., and mix together really well, adding a spoonful or so of
pasta -
cooking water to bring some starchy creaminess to the sauce.