Prawn toast with Sriracha® and sesame mayonnaise

Name: Prawn toast with Sriracha® and sesame mayonnaise
Prep time: 50 min
Cook time: 1 h
Total time: 1 h 50 min
Cuisine: Asian
Ingredients: 30 g sesame oil; 175 g vegetable oil; 1 egg yolk; 1 tsp Dijon mustard; 30 g Sriracha® sauce; 20 g white vinegar; 1 pinch sea salt; 30 g panko breadcrumbs; 20 g black sesame seeds; 20 g white sesame seeds; ⅛ tsp sea salt, to taste; 1 garlic clove; 1 ½ cm piece fresh ginger, peeled and cut into slices; 1 spring onion/shallot, trimmed and cut into thirds; 1 sprig fresh coriander, leaves only; 250 g raw king prawns, peeled and deveined; 1 egg white; ½ tsp white sugar; ½ tsp sesame oil; ½ tsp soy sauce; 5 slices white bread (thick slices); 1 egg; oil, for deep frying (enough for 10-12 cm deep - see Tips)