My achievement is putting a tasty, nutritious meal on the table almost every night. I rarely get a complaint, though I live with someone who complains about almost everything else. He knows which side his bread is buttered on.
Probably spaghetti because I make the best I have ever tasted and now I do not even use ground beef in it which I did for years although I realize many Italians don't use meat or so I have been told. If it doesn't turn out perfect I can tell just by taste exactly what to add to make it perfect and of course I must have Italian loaf bread either sliced or split down the middle toasted just a couple minutes in the oven or under broiler with butter and garlic herb seasoning, and coleslaw or salad.
My proudest cooking achievement would be the birthday cake I made for my daughter last year. I've made a lot of birthday cakes. I've even dropped birthday cakes on the floor; I've made inedible, dry birthday cakes one could use for a door stop, or -gasp- my precious birthday cake became fodder for a food fight I started. But this cake I made for my daughter was pure joy from beginning to end-- A triple chocolate mousse cake from the pages of Cooks Illustrated Magazine. At some point I even included this cake in a Hub.