Preheat the oven to 350 degrees. Coat a baking sheet with non-stick cooking spray.
In a small bowl, add the potatoes, olive oil and salt. Toss to evenly coat.
Spread the potatoes in a single layer on the baking sheet.
Roast until golden brown and tender about 20 to 25 minutes. Set aside to cool while you put the rest of the salad together.
Peel the hard boiled potatoes and slice them into quarters lengthwise.
Put the Salads Together
Into each of the four containers, place 1 cup of the spinach, top with ¼ cups of the potatoes, 4 egg quarters, ¼ cup of green beans and tomatoes, ¼ cup green olives and ½ can of the tuna.
Sprinkle each with the black pepper.
Notes
When ready to eat, serve with your favorite dressing.