Learned Recipes should be stored in the notebook

I agree with this, it would be very handy indeed! There is one way to check which recipes they have tried though. All CL food stall recipes are Level 1 in cooking. Take a look at what dishes your Sims can cook and the ones already tried should be listed among the other Level 1 dishes. Hope this helps! :)

Nevermind the striked out part, I missed where you said 'without access to a stove or refrigerator' so you already know about that. My apologies...

Happy Simming and Happy Holidays! <3