Karen's version of Farro Salad

Amounts are approximate. 

  1 cup dry emmer farro, cooked in instant pot
  1 onion, minced and lightly sauteed
  1/2 to 1 cup sliced kalamata olives 
  1/4 cup capers
  1/4 cup walnuts, toasted and chopped
  1/4 cup dried cranberries
  1/2 cup crumbled feta cheese
  Vinaigrette dressing