Matzo Filled Pinwheel Meat Loaf

2 lbs. lean ground beef
3/4 c. matzo meal
1/4 c. tomato juice
2 eggs
1 t. salt
1/4 t. pepper
FILLING:
2 matzos, crumbled fine
3 T. onion, minced
3 T. chicken fat (or oil)
1/2 t. salt
dash of pepper
1/3 c. hot water
TOPPING: (optional)
tomato-mushroom sauce

Mix beef with meal, juice, eggs and seasoning. Make a ball and roll between 2 sheets of waxed paper into a rectangle 1/2" thick. Remove top sheet. Spread meat with filling (which may be prepared in advance). Using waxed paper as a guide, roll like a jelly roll. Remove bottom paper when you place this in a greased shallow baking pan. Cover with sauce and bake for 1 hour at 350°. Yield: 6-8 servings.