Boricua plantain sandwich Recipe | Food Network UK

Ingredients

• For the sandwich
• 2 large green plantains (about 25cm long and 7.5cm wide)
• Vegetable oil
• Salt and freshly ground black pepper
• 4 (175g) flank steaks
• 175g salted butter, melted
• 200g Cajun spice, recipe follows
• Chipotle mayonnaise, recipe follows
• 200g mixed grated cheese (Monterey Jack and Cheddar)
• Crispy fried onions, recipe follows
• For the Cajun spice
• 75g breadcrumbs
• 1/2 tsp cayenne pepper
• 1/2 tsp black pepper
• 1 tbsp salt
• 50g paprika
• 1 tsp dried oregano
• 1 tsp dried thyme
• 1 tbsp garlic powder
• 1 tbsp onion powder
• For the chipotle mayonnaise
• 225ml mayonnaise
• 1 tsp chipotle sauce
• For the crispy fried onions
• 120g plain flour
• 1 1/4 tsp salt
• 1/4 tsp black pepper
• 1/4 tsp garlic powder
• 1/4 tsp onion powder
• Pinch cayenne pepper
• 1 large Spanish onion