Beat the eggs, then mix with cream and oil, then add dry mix and some water, keep adding water until dough consistency with no lumps.
Spread on a greased baking pan (250x300x50mm), bake at 180 C for 25 minutes, let cool.
Chop the fish with a fork, mix with all the ingredients except for cheese.
Spread your mixture evenly over the crust, top up with the grated cheese.
Bake at 125 C for 40 minutes.