Here’s a recipe I make every August in preparation for Octoberfest. It’s not exactly per style as I use an ale yeast instead of a lager yeast. But it comes out pretty clean and fairly close to style without lagering.
https://www.brewersfriend.com/homebrew/recipe/view/870733/fall-frenzy
https://www.brewersfriend.com/homebrew/recipe/view/870733/fall-frenzy