Step #1 In a large bowl mix eggs, onion, 1/2 c of the sour cream, mustard, & milk; stir in the bread crumbs, parsley, Worcestershire sauce, salt & pepper.
Step #2 Add beef; mix throughly.
Step #3 Pat into a 9x5x3-inch loaf pan.
Step #4 Bake uncovered, in a 350 degree oven for about 1 1/4 hrs.
Step #5 Let cool 10 mins remove this from pan.
Step #6 Meanwhile for gravy, in medium saucepan stir this togather the remaining sour cream & the dry gravy mix.
Step #7 Add water as called for on package.
Step #8 Cook according to package directions.
Step #9 Slice meat loaf & serve this with mashed potatoes & gravy.
Enjoy the Sour Cream Meat Loaf W/ Mashed Potatoes recipe