Orzo without sauce brownies vinaigrette

1 lb orzo pasta , cooked and drained according to package directions (I like Ronzoni best) 1/2 red onion , diced pitted black olives , sliced 3 cups grape[...]

1 lb orzo pasta , cooked and drained according to package directions (I like Ronzoni best) 1/2 red onion , diced pitted black olives , sliced 3 cups grape[...]

add to shopping list 2 cups orzo (rice-shaped pasta) 1 1/2 cups very thinly sliced celery (about 3 stalks) 1 pint grape tomatoes, halved 1 bunch radishes,[...]