Middle Eastern Salad (Zalata)

Ingredients

• 1 small head of romaine lettuce ((shredded))
• 2 medium Persian cucumbers ((sliced))
• 2 medium ripe tomatoes ((chopped))
• ¼ cup fresh mint leaves ((chopped))
• ½ small yellow or red onion ((sliced))
• ¼ cup olive oil
• 3 Tbsp fresh lemon juice
• 1 tsp dried mint
• ½ tsp sea salt
• ¼ tsp black pepper
• 1 tsp sumac ((optional))
• ½ cup crumbled feta cheese