Chicken, Grape, and Rice Salad

Ingredients (8)

• + 1 ⅔ cups water add to pantry
• + 1 tablespoon margarine add to pantry
• + 1 (5 ounce) package long grain and wild rice mix (such as Mahatma®) add to pantry
• + 4 cooked chicken breast halves, chopped add to pantry
• + ½ red onion, chopped, or to taste add to pantry
• + 1 ½ cups seedless red grapes, quartered add to pantry
• ✓ ½ cup cashews
• + ¾ cup mayonnaise add to pantry