Roach Jello ??

[Bamboo]

This might be a topic talked about a billion times ... sorry ..... I made up this concoction roach jello made of walmart brand jello ( orange and strawberry flavor ) with yellow squash , carrots , broccoli, and banana ... I tried feeding them to Giant Caves , Orange heads and Red Runnes ...... none of them touched it .... when I put a slice of orange on it , within minutes everyone was on it ! I guess my question is .. What is the perfect or at least better concoction / ingredients to making the best tasting jello that roaches will gobble down like fried chicken.