Greek-style pita sandwiches

Ingredients

• 200 g oyster mushrooms
• 1 pinch salt
• 1 red onion
• 2 pita breads
• 4 tbsp hummus
• 1 tomato
• 1/4 cucumber
• 15 g parsley
• 2 tbsp olive oil
• 1 tbsp lemon juice
• 1/4 tsp dried oregano
• 1/4 tsp onion powder
• 1/4 tsp garlic powder
• 1/4 tsp pepper
• 1 pinch ground cinnamon
• 1 pinch ground nutmeg
• 1 tsp starch
• 1 tsp soy sauce