Raspberry Mouse?

I was reading the menu for last Saturday when I noticed the spelling of raspberry. Rasberry - missing p. Then I saw the word omlette with missing e. It should be omelette. What is the origin of that French word? Lette or ette suggests small.

Finally I noticed rasberry 'mouse' (sic). That does sound delicious. I imagine the Romans served their favourite dish, dormouse, surrounded by raspberries. Has chef Heston Blumenthal heard of it?