Zrazy with Horseradish Stuffing (Meatballs)

The name of this recipe intrigued me from the beginning. I have never met a Ukrainian who has heard of this before or who didn’t fall in love and demand the recipe after trying it. The meatball itself is formed from a meatloaf recipe which makes for the most tender and flavorful meatball ever. Everyone wants to know how to get the horseradish inside. The secret is mix it with mashed hard-cooked egg yolks, soft bread crumbs and melted butter which solidifies into a substance that is firm and can be easily molded. You have to cook them very carefully so they do not fall apart. A small amount of sour cream gravy is then made and poured over the meatballs before baking; this is so intensely flavored that it just completes the experience. My mother-in-law would not eat horseradish, yet loved this meatball. People argue about the horseradish “ it isn’t there, there isn’t enough, there is too much, etc. I waited 15 years to make it a second time, and then made 4 batches in one weekend. I am not going to wait 15 years before making it again. I then tried doubling the sourcream gravy, but it did not taste quite as good, I suppose because the drippings are not as concentrated.