Arugula-Nectarine Summer Salad

Ingredients

• ¹/₂ red onion, sliced thin
  
• 4 cups arugula
  
• 2 nectarines, sliced
  
• 2 teaspoons extra virgin olive oil
  
• 2 teaspoons balsamic vinegar
  
• 4 teaspoons nuts
  
• 4 teaspoons pecorino romano, shaved