Ingredients

1/4 teaspoon Dijon mustard

1 tablespoon red-wine vinegar

1 tablespoon olive oil

1 cup diced chicken

1 heaping tablespoon minced red onion

1 heaping tablespoon minced celery

2 teaspoons chopped fresh flat-leaf parsley

Coarse salt and ground pepper, to taste

Avocado or beefsteak tomato, if desired

Preparation

Whisk together mustard, vinegar, and oil; toss with remaining ingredients.

To serve in an avocado half: Slice avocado in half lengthwise, and remove pit; mound chicken salad in each avocado half (makes 2 servings).

To serve in a roasted tomato: Preheat oven to 400 degrees. Slice top off a large beefsteak tomato; scoop out flesh to form a shell, and brush inside with a bit of olive oil. Bake until slightly softened, 3 to 5 minutes. Let cool slightly, then fill with chicken salad.