This is a quick, favorite lunch around here that occasionally makes it to the dinner table. For this one I don't use specific measurements, just adjust for however many you are feeding.
Pasta, spinach, and walnuts
Spaghetti or other pasta
walnuts (pieces, not the expensive walnut halves or chopped walnuts; I always have a big bag from BJs on hand)
Cook the pasta according to the package to al dente. When it's almost done, add the spinach to the pasta and in a skillet in some olive oil saute the walnuts until toasted. Watch that you don't burn the walnuts! Drain the pasta and spinach and add to the walnuts. Toss to mix and finish cooking. Add salt and pepper to taste.