Can you marinate meat in milk that has had lemon juice added to it?

No, you should not marinate meat in milk with lemon juice added. While milk can be used as a marinade, adding lemon juice or other acidic ingredients to the milk will cause the proteins in the meat to toughen. This is because the acid in the lemon juice denatures the proteins on the surface of the meat, causing them to become tough and chewy. Additionally, the acidity of the lemon juice can also react with the minerals in the milk and cause the marinade to curdle or become grainy.