A Formula for Bean and Grain Salads

If using a cooked vegetable, it's OK to use just one. If using a raw vegetable, use a mix of 2 or even 3. You can substitute 1/3 cup of your favorite homemade or store-bought vinaigrette for the oil and vinegar or lemon juice. Serves 4 as a main course and 6 to 8 as...