Tzatziki Chicken Bowls

Name: Tzatziki Chicken Bowls
Ingredients: 2 cups peeled and grated English cucumber; 1 teaspoon salt, divided use; 1 teaspoon minced fresh garlic; 2 teaspoons red wine vinegar; 2 Tablespoons extra virgin olive oil; 2 cups plain Greek yogurt; 1/4 teaspoon freshly ground black pepper; 1/3 cup minced fresh dill; 6 cups thinly-sliced romaine; 2 cups chopped, cooked chicken; 24 cherry tomatoes; 1 cup pitted kalamata olives; 1 bell pepper, seeded and chopped; 4 thin slices red onion; 4 tablespoons crumbled feta, or to taste; 4 peperoncini for optional garnish