Get all your ingredients together to begin making your marinade.
Begin making your marinade in bowl, by first adding the olive oil.
Then add the balsamic vinegar.
Then add the rosemary.
Then add the oregano. Stir this together until it is thoroughly mixed.
Now add the mushrooms to the marinade.
Put the steak cubes into the marinade mixture.
Add the minced garlic and stir to mix. This will make more garlic stick to the meat if you add it last on top of the meat.
Now begin threading the skewers with meat.
Then add mushrooms to the skewer.
Then add the potato, meat, and mushroom to fill the skewers.
Once skewers are done, prepared place on rack and let cook for 5-7 minutes
Then flip the skewers and let cook for another 5-7 minutes
Finally take the Steak & Mushroom Kabobs off the grill and prepare to eat!