Grammar card for Japanese?

I am a bit stuck, I want to make grammar flashcard but not sure how to do it best, because it conveys a 'meaning' and it's not just conjugation 

For example: 

This is delicious (The underlying meaning: You told me it wasn't delicious but it is!)
これは美味しいじゃん。
(Kore ha (This is) Oishii (=delicious) jan (=you told me it is not but it is))

So "じゃん" is the important part here, conveying that someone told me something that I found out isn't true. How can I create a flashcard with images that convey this meaning. Japanese has a ton of this stuff.
Should create a card with  "じゃん"  in the front and a bunch of example pages in the back? Because this just can't be conveyed with images. 

Any other ideas?