Fraisier is a French strawberry cake : a génoise (white cake) is filled with crème mousseline and fresh strawberries. This is a classic French dessert.

Fraisier is a fancy French word for strawberry cake. If you want to know how to pronounce it, go : fray zee ey. There, you can now say fraisier ;)
Strawberry cake (this version, filled with cream and fresh strawberries) has been one of my favorite desserts ever since I was a little one. Most birthday cake pictures from my first ten years on this planet are of fraisiers. I think it's because it combines a lot of my favorite things when it comes to desserts : strawberries, cake, and cream. A lot of cream.