My husband is a vegetarian -- nothing with a face -- so if I am eating chicken breast or fish, I am making one serving. So many recipes for chicken breast or fish call for making some kind of sauce or marinade, but when you are making one serving, it's pretty hard to make that tiny an amount of liquid. When I divide a recipe for four into fourths, I find myself mixing one teaspoon of balsamic or something with dry ingredients and it's difficult.
What's your favorite way to make one serving of these items?

The marinade should be fine frozen as long as you don't leave it like that for months.