- 2 vine-ripened tomatoes, cut into 1/4-inch cubes
- 1 red bell pepper, cut into 1/4-inch cubes
- 1 green bell pepper, cut into 1/4-inch cubes
- 1/2 seedless cucumber, cut into 1/4-inch cubes
- 2 radishes, cut into 1/8-inch cubes
- 2 tablespoons extra-virgin olive oil
- 1 scallion, cut into 1/8-inch cubes
- 1 teaspoon lemon juice, or to taste
- 1/2 teaspoon ground sumac
- salt to taste
- Toss tomatoes, red bell pepper, green bell pepper, cucumber, radishes, olive oil, scallion, lemon juice, sumac, and salt together in a bowl; let stand for flavors to blend, about 20 minutes.