Piyaz (Navy Bean Salad)

Ingredients (10)

• 1/2 red onion thinly sliced
• 2 tsp ground sumac
• 1/2 tsp Aleppo chile flakes
• 1/2 tsp salt
• 1/2 tsp black pepper
• 3 cups medium tomatoes quartered
• 1 cup flat leaf parsley roughly chopped
• 1 lemon
• 1 tbsp olive oil
• 15 oz cooked white beans drained