Swiss Steak

This is a great cold weather meal that was passed from my Grandma to my Mom and now to me! :)
 Here is what you will need:
Round Steak - plain or tenderized (as much as you and your family will eat)
Horseradish mustard
Onion
Flour
Veggie Oil
Water
Pepper and Season Salt to taste.

Spread the horseradish mustard over one side of the steak. Lightly sprinkle pepper and season salt to taste. Sprinkle flour over the top and press with fingers to seal it on the steak. Do the same with the other side. (I usually do one side, transfer to the frying pan and then do the other side while it is in the pan.)
In a frying pan (that has a tight fitting lid) that can be placed in the oven, spray with cooking spray and add about 1/4 cup or less of oil. Let that get hot and add the steaks. Brown each side. After you flip one side add the onion wedges. (As many as you prefer) When both sides of the steaks are browned, add enough water to come up to the edges of the steaks. Usually 1-2 cups of water. You don't want to use more than you will need because this is making a gravy from the flour and mustard you have used on your steaks.
Add lid to pot and put in oven at 350 degrees for 2 hours. Check after an hour and again after an hour and a half to make sure you don't need to add water.
Enjoy!