Place your skillet on the stove and add enough water to cover the sausages, or mostly cover them. Keep the brats nearby but out of the pan for now. A wide pan works best because the sausages can lie flat.
Turn the heat to medium-high and wait for bubbles to rise. You want a slow, steady boil, not a violent one. Rising bubbles tell you the water is hot enough.
Lower the bratwursts into the bubbling water. Put the lid on right away and switch the burner off. If your lid doesn't fit perfectly, don't panic. A close fit is nice, but improvising works too.
Set a timer for seven minutes and walk away. The hot water cooks the sausages gently without any extra heat. I love this part because I can prep sides while the brats do their thing.
If you'd like extra peace of mind, slide a meat thermometer into the open end of one brat. A reading between 145 and 160°F is perfect. It's optional, but it's a nice confidence boost.
Lift the brats out with tongs and set them on a plate. Then carefully pour the water out of the pan. Taking the sausages out first makes draining much easier and safer.
Return the brats to the pan with a little oil over medium heat. Brown them for about four minutes on the first side. Flip them and brown the other side for another four minutes.
If your pan is all metal, the brats may stick at first. Don't fight them. They release on their own once the casing caramelizes, and that's your cue to flip. Serve them hot.