Combine beef, lime juice, orange juice, onion, cilantro, garlic, jalapeños, chilli flakes, cumin, paprika and salt in a large bowl. Mix well with your hands for about a minute, until the meat has combined with the other ingredients. Divide the meat mixture into 4 equal parts and firmly mould them into round patties about 1-inch thick. Drizzle a skillet or non stick pan with a small amount of oil; preheat pan over medium-high heat. When pan is hot, sear the burgers for 5 to 6 minutes on each side until cooked to your liking. In the last minute or two of cooking, add the sliced cheese over the patties and allow the cheese to melt.

Build burgers with lettuce (optional), beef, guacamole and pico de gallo.

Cut the avocados in half lengthwise. Remove the pit from the avocado and discard. Remove the avocado from the skin and place the avocado flesh into a bowl.

Add the lemon juice, lime juice, red onion, chives, jalapeño, salt and pepper. Mash with a fork until half smooth and creamy. Taste and add more salt and pepper if desired.

Combine the tomatoes, onions and cilantro together in your serving dish. Drizzle with the lime juice; salt to taste.