BBQ-Honey Cajun Chicken Sandwich

Name: BBQ-Honey Cajun Chicken Sandwich
Ingredients: 1 tbsp honey; 2 tbsp bbq sauce; 1 tsp garlic granules; 0.5 lime lime juice; 1 tsp sriracha; 1 tbsp water (to loosen); 2 chicken breasts (bashed to 3-4cm thickness); 0.5 tbsp cajun seasoning; 1 egg; 50 g cornflakes (broken up with your hands into smaller pieces); 2 brioche burger buns (cut in half and lightly toasted); 2 tbsp light mayonnaise; lettuce (chopped)