Pork Chops/Chicken with "Grilled" Onions & Green Peppers

This is a really delicious, simple, & healthy dinner. We both love this.

I buy about a pound of "protein," whether that be chicken breasts, pork chops, or whatever I can find (flank steak, etc.)
I also buy:
1 large sweet yellow onion and 2 bell peppers (green and/or red or yellow)
Cut the onion into strips and cut the peppers into chunks.
I cook the chicken/pork/steak in a skillet with salt & pepper and a sprinkle of olive oil. When it's browned, I put it in a bowl to "rest" (and cover it with foil). Then I put the onion and peppers into the skillet (don't rinse it!). They will cook nicely in the leftover chicken/pork/steak juices. You have to press the pieces down into the pan because they like to curl up. This is SO GOOD.