Tunisian Fricassé Sandwich with Spicy Harissa and Tuna Aioli

Ingredients

• 3 ½ cups all-purpose flour
• 1 packet (2 ¼ tsp) instant yeast
• 1 tsp sugar
• 1 tsp salt
• 1 cup warm water
• 2 tbsp olive oil
• 2 tbsp harissa paste
• 1 tbsp olive oil
• ½ tsp cumin
• ½ tsp coriander seeds, crushed
• 1 can (150g) tuna in olive oil, drained
• 2 cloves garlic, minced
• ⅓ cup mayonnaise
• 1 tbsp lemon juice
• 2 boiled eggs, sliced
• ½ cup cherry tomatoes, halved
• ¼ cup green olives, pitted and sliced
• 1 tbsp capers, rinsed