Another church function favorite.
Whisk oil, sugar, vinegar, onion, poppy seeds, mustard, and salt together in a bowl until dressing is smooth. Cover bowl with plastic wrap and refrigerate for 24 hours.
Put lettuce in a bowl and drizzle dressing over lettuce; toss to coat. Add Swiss cheese and cashew and toss to coat.
Per Serving: 522 calories; protein 10.5g; carbohydrates 27.5g; fat 42.7g; cholesterol 24.8mg; sodium 175.8mg.