I use to cook round steak all the time. I cooked it so often that my family is now so tired of it they have asked not to have it for awhile!
I will usually dredge it in flour mixed with salt, pepper and a little garlic powder.
Then I will brown it in a little cooking oil, maybe a tablespoon because I usually just eyeball it.
I will then cover it with a couple of cans of tomatoes, chopped onion, green pepper and sometimes celery and carrots.
Place in the oven at about 300 and cook it for about 4 hours. It will be very tender. I will then serve the pan drippings with mashed potatoes.
Another way to cook it is after you brown it in the pan add a couple of cans of cream of mushroom soup and a couple of cans of water and then bake it for the same temp and time and serve over noodles.
If you want to get really fancy!!! Pound it and then lay it over about 5 pieces of string. Fill the middle with some feta cheese, chopped veggies like carrots, celery, onions and green pepper. Sprinkle with your salt, pepper and garlic powder. Roll it up starting with the long end and then tie it with the string you have laying under the meat so you have a log meat roll tied with string. Put in your pan and cover with a jar of spaghetti sauce and a can of tomatoes and then bake at 300 for a couple of hours. When its done you slice the meat and it makes cute little rolls and you can serve with a starch like potatoes or rice!