Eva Martinson was like an adopted Grandmother to me and my sisters. She would stay with us when my parents went somewhere on business. This is her seasoning salt recipe. I use it in everything when I cook, in place of salt and pepper. It is especially good to sprinkle on steaks while they are thawing.
1 3 lb box of Kosher salt
3/4 c garlic powder
3/4 c ground mustard
3/4 c parsley flakes
3/4 c coarse ground pepper
Mix all ingredients together. This makes a large amount, but when stored in a a cool dry place, it lasts forever.
***Depending on the potency of the garlic powder and mustard powder, I have added up to 2 pounds more of the Kosher salt. Adjust the seasonings to your taste.