This reminds me of a recipe I use frequently from Cocina Criolla.
You marinate turkey (or in my case a whole chicken)
1 clove of garlic
1 peppercorn
1/4 tsp oregano
1 tsp salt
1 tsp olive oil
1/2 tsp white vinegaar
For each pound of turkey/chicken. But you can add more or less of whatever to get the flavor you want. I put the whole thing in a gallon ziploc, slosh it around to coat evenly, then marinate for at least an hour, and then roast. You could probably replace the garlic for the sage, and maybe put more oil to even out the flavors a bit.
This book is the reference book I use for PR recipes that I don't know or quite remember.
There's an English version.
Her recipe is what I used to start my pasteles when I decided to make it.
The go to is this book. https://www.amazon.com/Cocina-criolla-Carmen-Valldejuli/dp/0882894293
They actually are still making new copies of the book apparently and it is on Amazon in both Spanish and English
I use this book as a reference:
follow the quantities for adobo, comes out awesome! Sometimes I add more garlic, because garlic
That way I get to make pernil when I feel like it (like next week)