Sometimes, it's better not to know.OMG...all this time I didn't know peppers had placentas...:surprised ! I've been eating them all along...urg!
I've been making the same type of stuffed jalapenos for about 30 years. I have several different stuffings including shrimp and crab stuffed ones. I also stuff the canned ones, the only canned ones I'll use are from Mexico and have bay leaf and garlic in them. The problem is that they are almost impossible to find in the states. The same company also sells canned stuffed jalapenos, but they're stuffed with tuna, good, but a unique flavor.