Kathy's Mason Jar Family Diner is a full service restaurant. We serve breakfast all day. With amazing family as the staff, we provide great daily specials, desserts, baked goods and more. all our food is cooked fresh from scratch.  Come see us when you want some down-home country cooking. Whether you live near us - in the Keystone Lake peninsula off I-412, or you are passing through, come enjoy some diner food. We are on the I-412 service road between the Old Keystone Road and the Bear’s Glen exits.