- 1/4 cup mayonnaise
 - 1/4 cup olive oil
 - 3 tablespoons Dijon mustard
 - 2 tablespoons Champagne vinegar or white wine vinegar
 - 5 cups mixed baby greens
 - 1 15-ounce can small white beans, rinsed, drained
 - 2/3 cup chopped drained roasted red peppers from jar
 - 1/3 cup chopped red onion
 - 1 12-ounce can chunk light tuna
 - 2/3 cup Kalamata olives or other brine-cured black olives, pitted, halved
 
- Whisk first 4 ingredients in small bowl. Season dressing with salt and pepper. (Can be made 1 day ahead. Cover; chill.)
 - Toss greens in large bowl with enough dressing to coat. Place greens in center of 4 plates. Toss beans, red peppers and onion in medium bowl with enough dressing to coat. Top greens with bean mixture, then tuna, dividing equally. Garnish with olives and serve.