The flan is going to be built upside down.In a large saucepan, heat up milk, cream and vanilla. Meanwhile, in a stand mixer fitted with the whisk attachment, beat to foamy stage eggs with yolks and sugar, then add corn starch. Temper egg-sugar mixture with about half of the hot milk. Transfer back to the saucepan. Bring to boil and cook for 2 minutes whisking constantly. Remove from the heat, and mix using an immersion blender. Fill greased cake ring and let cool 2 hours prior baking.
Fish Scales
To mimic fish scales, any pastry can be use. Cut about 60 small disks and freeze. Make the scale fish pattern on a perforated silicon liner (greased with cooking spray), or use a silicone mat. Freeze pastry 20 min prior baking 10 min at 375ºF. Place and cut though the crust with the cake ring. Set aside.
Baking Flan
Preheat oven to 375ºF/190ºC and bake flan for 55 min. Let cool completely prior removing cake ring – flip and chill. Slice off the mouth of the fish and place it on the tail. Make the eye with chocolate disks, chips et M&M'S. Add fins using parchment paper cups. Flan can be kept refrigerated for a few days. Do not freeze. Enjoy!