Lettuce: typically romaine lettuce or other leafy greens. Cucumbers: diced or sliced. Tomatoes: chopped or sliced. Radishes: thinly sliced. Red onions: finely chopped or sliced. Fresh herbs: such as parsley and mint. Pita bread: toasted or fried and broken into pieces. Olive oil: for the dressing. Lemon juice: for the dressing. Sumac: a tangy, lemony spice often used in Middle Eastern cuisine. Salt and pepper: to taste.