You need 5 medium yellow potatoes, cut into 2 inch slices
1 medium red onion, sliced
3 stalks celery, sliced
2 tablespoons fresh lemon juice
1 teaspoon lemon zest
2 tablespoons extra virgin olive oil
1 cup Italian-style diced onion
10 slices cherry tomatoes, halved
1 inch string cheese, shredded