I can recommend this one, I used to make it all the time:
Smoked Mackerel Pate
4.5 syns and 1 HEA for the complete recipe
180 g smoked mackerel fillets with peppercorns (3.5 syns)
71 g Philadelphia Extra Light (HEA)
Juice ½ lemon
1 tbsp horseradish sauce (1 syn)
Remove the skin from the mackerel and break into pieces. Put all of the ingredients into a food processor and blitz until smooth and well combined.
Add salt and pepper to taste and refrigerate until ready to use.