I don't know of any white eggplant that are not edible and I've grown quite a few varieties. Most white types are actually quite mild. You might look into Baker Creek Heirloom seeds catelog (also rareseeds.com) to review descriptions of many ethnic varieties, some white, some orange, some red, some green. As Nc-crn mentioned there are a few of those that are very bitter but that is the cultural preference of some people. One of my more frequent customers of these varieties talks of a favorite eggplant recipe called "Bitter balls". There may be non-edible fruits that somewhat resemble eggplant. Baker Creek offers seeds of the nipple fruit that is listed as non-edible. If in doubt about what you are growing contact the seed supplier for a definitive answer.

😊 I only use the eggplant to make Mediterranean dishes ( you probably havn’t heard or seen) one dish is made with roasted eggplant on fire then mashed and sautéed with garlic, turmeric, tomatoes and eggs, has a smoky flavor and aroma to it. ( another dish is with sauted eggplants cooked with lots of garlic, tomatoes, dried mint, turmeric and a dairy product called Kashk. Also eggplant stew with lamb...all are very delicious. I’m more used to cooking with the long skinnier eggplants ( less seeds).

Have lots of heirloom and non-heirloom seeds to trade. Please check out my exchange page! Here is a link that might be useful: My Trade List

i have bitter gourd, snake gourd seeds. contact me at rsubam@gmail.com