Pommes dauphinoise is incredibly easy to do, however it tastes so delicious your guests will think you are a culinary genius.
A very easy but nice thing to go with are pork chops, cover with a teaspoon of onion marmalade (out of a jar, English Provender Co for choice), then a few slices of rocquefort. Grill the pork chops first and then top them with this and put under grill for 5 mins or so. Easy peasy.
I can never be arsed with starters. I do a very nice mixed board with pate, serrano ham, olives, houmous, taramasalata sometimes, nice breads and grissini. If you do do a starter, don't bother with anything that needs to be cooked. If you can do something cold (which can be partially prepared before your guests get there) it will be unimaginably easier.
Pudding wise, in summer I like chocolate pavlova (make a meringue base, cover with whipped cream, melt some very nice dark chocolate and drizzle over, it sets hard and glossy). Also Baked Alaska is very impressive and 'oooh' looking, and is certainly not as difficult as you would believe.
Or, baked peaches - baked peaches in oven with vanilla sugar, serve with nice shop bouight vanilla ice cream and a raspberry coulis (blend together some raspberries, which can be frozen if you can't find fresh ones, some water and icing sugar to taste. You do need to sieve it to get rid of seeds etc.)