two suggestions:

walnut oil
balsamic vinegar
tsp dijon mustard
tarragon (dried)
garlic (tons... if ya like it)
salt & pepper

easy and good. you can also use peanut oil, it has a less subtle flavor.

and my alltime fave, though creamy:

canola oil
juice of half lemon
salt & pepper
garlic (you guessed it: tons)
dill & parsley
sour cream

yumbowski