Ingredients :

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• Ingredients :

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• 600-700 gr of fresh tuna

• ½ onion finely chopped

• 1 grated lime

• 5 finely chopped basil leaves

• 2 tablespoons virgin olive oil

• 1 tablespoon of soy sauce 

• 1 tablespoon of sriracha sauce (spicy) (optional)

• 1 teaspoon roasted sesame seeds

• 2 egg yolks

• Salt and pepper to taste

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• How to prepare it:

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• Cut the tuna into slices and then chop them into small dices with a knife. Chop the onion and basil leaves. Mix all the liquid ingredients in a bowl together: the lime zest, olive oil, soy sauce, sesame seeds and egg yolks. Salt and pepper to taste. Let the mixture stand in the fridge for at least half an hour. 

• Heat the pan and brush it  with olive oil. Form four very fat hamburgers and and place them on the very hot pan for about five minutes on each side. The cooking point will be on your taste.

• To prepare the mayonnaise:  put the egg, oil and salt in the blender glass. Once done, add the chopped avocado and lemon juice and blend again until you get a fine and well emulsified mayonnaise. Store in the fridge.

• To serve it: Spread the base of the bun with the avocado mayonnaise, place on top some tomato slices and some lettuce leaves and the tuna burger.

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To serve it: Spread the base of the bun with the avocado mayonnaise, place on top some tomato slices and s