When I was at the grocery store the other day I noticed some huge rocks among the mangoes and pineapples in the fruit section. These things were actually a fruit called mamey sapote. My fiance and I like to try weird new fruit, so I grabbed one and continued on with my shopping. When I got home I researched a bit about this weird fruit and found out it's supposed to taste like a mix between a sweet potato and pumpkin. Interesting. I also found out that you're supposed to let it sit on the counter for a week or so to let it get good and ripe before you eat it. I'm impatient so right when the week mark hit I cut this guy open. I probably should have waited longer. 
Supposedly when the fruit is good at the store, the flesh inside should be bright pinkish red when you scratch off some of the skin. If the flesh is yellow or green don't buy that one; it was picked too early. After that you wait for the fruit to get good and ripe before you cut into it. Apparently you're supposed to wait until the skin holds an indent when you poke it. Of course I didn't wait that long.
At this point I realized I really should have waited longer. In videos I watched I people easily cut into the fruit but for me it was very hard.
Cracking this thing open.
And here's the inside! With the huge seed inside! When the flesh is really ripe you're supposed to be able to just scoop it out with a spoon, but since mine wasn't ripe the texture was more like a sweet potato. There was a tiny area where it was soft like that so we got to taste test it a tiny bit. It was... interesting. It was pumpkin-sweet potato-melon all at the same time. Very strange. All in all, if I found one of these at the store again I'll buy another one just to try one more time since I really know now the importance of letting it get really ripe before you try to eat it.
Back to the seed: oh yeah, look at this guy! It was already cracking open (you can't tell in the photo. It's cracked on the dark brown part of the seed). You know I'm going to attempt to grow it. I did the zip lock method, the same method as the mango.
Speaking of my mango plant, here's a little update:
A few days after I planted the seed, a little sprout started to emerge!
And only three days later it's already this big!
This thing is really taking off. Super exciting!