I copied this out of a Sunset Magazine on the back side of a paper baguette sleeve one afternoon at hand therapy. Didn't have much time, so it's only the essentials, but I figured it might be worth a try, and at least nobody'd be likely to have eaten it before.

I quadrupled this for a Fourth of July party, and it went over so well that I am including it here.

1 T. lemon juice
3 T. olive oil
¼ t. dry mustard
¼ t. salt
¼ t. ground black pepper
1 T. fresh thyme
6 oz. or 3 c. arugula (the older name for this stuff is "rocket lettuce," but most Americans now ccall it "arugula.")
6 oz. or 1½ c. marionberries or other blackberries
2 oz. blue cheese, crumbled (My favorite blue cheeses are aged gorgonzola and roquefort, but neither of them crumbles. It's much easier to do this with a drier blue cheese like D'Aosta or Cabrales. I am informed that you can buy containers of pre-crumbled blue cheese in supermarkets but have not tried them even though they would certainly make distributing the cheese easier.

Whisk together the lemon juice, oil, mustard, salt, and pepper.

Mix in the thyme.

Toss with the lettuce.

Toss with the berries.

Plate and sprinkle with the cheese. For the party, I just dressed the lettuce and put the blackberries on and then sprinkled the cheese on top of that.