Add the flour into a bowl, make a well and crack in the egg, whisk the egg, then add in the beer and whisk everything together until you form a batter with no lumps, then add in the onion, garlic, parsley, paprika and season with sea salt & black pepper, whisk together until well mixed

Drain the cans of tuna into a fine sieve with a bowl underneath, flake the tuna to remove any excess oil, then add the tuna into the batter and mix together

Heat a large fry pan with a medium heat and add in the olive oil

Once the oil is hot but not smoking, about 4 minutes, add in spoonfuls of the batter into the pan, all in a single layer and evenly spaced out (cook in batches), fry for 2 minutes per side or until golden fried all around, then add into a plate with paper towels

To make the aioli add the mayonnaise into a bowl, finely grate in the garlic, add the lemon juice, olive oil and season with sea salt & black pepper, whisk together until well mixed

Add the aioli into a serving dish and decorate the tuna fritters around it, serve at once, enjoy!