Bring water to a boil; stir in barley and 1/4 teaspoon salt. Reduce heat. Cover; simmer 50 to 60 minutes or until barley is tender, stirring occasionally. Drain; cool. Transfer to a large bowl. Add kidney beans, tomatoes, parsley, green pepper and green onions; mix well. Combine lemon juice, oil, remaining 1/2 teaspoon salt and pepper; mix until well blended. Pour over barley mixture; toss. Chill 3 to 4 hours or overnight; toss before serving. Serve over lettuce leaves, if desired. NOTE: To substitute 1/2 cup Quaker Scotch Brand Quick Pearled Barley, decrease water to 1-1/2 cups and simmer time to 10 to 12 minutes. Proceed as recipe directs. NUTRITIONAL ANALYSIS per serving: calories 143 carbohydrates 16 g protein 4 g fat 7 g calcium 33 mg sodium 110 mg cholesterol 0 mg * dietary fiber 4 g