Beer, bratwurst, and onions

Conclusion: I don't like boiling the onions in beer. If you cook down the onions afterwards, it concentrates the flavor of the beer in them. Instead, I would prefer an actual pan sauce. (AKA 'bangers and mash)

Boil the bratwurst and onions in beer

This is an extremely common way to cook the three together. Unfortunately, it tastes far too bitter for me.

• https://midwestniceblog.com/beer-brats-and-onions/
• https://www.onceuponachef.com/recipes/beer-braised-bratwurst-onions-beer-brats.html
• https://www.foodiecrush.com/beer-bratwurst-onions-recipe-oktoberfest/

Bangers and mash

A traditional British dish is 📖bangers and mash (AKA sausages and mashed potatoes), often served with onion gravy.

• https://www.americastestkitchen.com/recipes/15332-bangers-with-onion-gravy   [archive] [recipe multiplier] [our own copy]
  • background: https://www.americastestkitchen.com/articles/6360-bangers-and-mash-needs-great-gravy [archive]
• https://www.all-thats-jas.com/english-bangers-mash/
• https://www.seriouseats.com/bangers-and-mash-with-onion-gravy-recipe-2
• A Guide to British Bangers

Other methods

[1] [2]