Melt the butter in a non-stick skillet over a low/medium heat. Swirl the butter to coat the base of the skillet. Crack the eggs into a mixing bowl. Finely chop the chives and add to the mixing bowl along with the lemon juice and a good pinch of salt and pepper. Beat together well to combine.
Step 2
Pour the egg mixture into the skillet. Swirl the egg so that it evenly coats the skillet. Leave to settle and cook through completely, so there is no liquid remaining on top. This will only take about 4-5 minutes.
Step 3
Carefully slide the cooked egg tortilla out onto a serving plate using a silicone spatula. Spread the cream cheese over one side of the tortilla. Scatter the arugula over the cream cheese.
Step 4
Roughly tear the salmon into bite-sized chunks. Scatter the salmon over the arugula. Fold the empty side of the tortilla over the filling to sandwich the filling inside. Serve immediately.