Slider Kale Salad

Ingredients

• 1 medium red onion, half finely grated, half thin sliced
• ½ cup regular or light mayonnaise
• 2 tablespoons plus 2 teaspoons Dijon mustard, divided
• 1 pound lean ground beef (organic if possible)
• 2 teaspoons Worcestershire
• ¼ teaspoon each: salt and ground black pepper
• 1 tablespoon olive oil
• 1 bunch (about 12 ounces) kale, washed, stemmed and torn into bite-size pieces
• ½ cup sliced cornichons or baby dill pickles