Hello Martha,
Pork neck (also known as pork collar) is an ideal cut for marinating in kefir because its natural marbling holds up wonderfully to dairy-based marinades. Kefir contains mild lactic acid and calcium, which tenderize the meat fibers much more gently than harsh acids like vinegar or pure lemon juice.
For the best results, the optimal marinating time is between 8 and 12 hours (overnight in the refrigerator). This allows the lactic acid to soften the connective tissues and infuse flavor deep into the pork without compromising its structural integrity.
If you are on a tighter schedule, a minimum of 4 to 6 hours will still yield good tenderness, particularly if the meat is cut into smaller portions or steaks.
To prevent the pork from becoming mushy, avoid leaving it in the marinade for longer than 24 hours. Even though dairy is gentle, prolonged exposure past the 24-hour mark will eventually break down the surface proteins excessively, leading to a mealy texture once baked.
A few helpful tips for the best bake:
1. Combine the plain kefir with sliced onions, garlic, salt, freshly cracked pepper, and your favorite herbs (thyme and bay leaf work especially well).
2. Keep the meat fully submerged and refrigerated throughout the entire marinating process.
3. Before placing the pork into the oven, lightly scrape or wipe off the thick excess kefir from the surface so the meat roasts and browns properly rather than steaming in the pan.
I hope this helps you recreate that wonderful family dinner experience!