In a skillet on medium-high heat, drizzle a little bit of olive oil to the pan and allow the oil to get hot.
Next, add the sliced onion and sauté the onions for 2 to 4 minutes or until tender.
Once the onions are soft, remove them from the pan and set aside.
In the same skillet add some butter and allow it to melt.
Then, add the sliced steak to the skillet and season the meat with the spices.
Sauté the steak slices and continue to cook the steak to your liking. (2 to 4 minutes)
Once the steak is nicely browned, set it to the aside.
Feel free to toast your bagel, you can toast it in some butter in a different skillet on medium heat. (Alternative: toast the bagel in the toaster, then add some butter to the bagel).
Next, cook your eggs in some melted butter. You may scramble the eggs or fry them - over easy or sunny side up. (Optional: you may season the eggs with a little salt & pepper)
Layer your bagel: Add a cheese slice, the steak filling, onions, then more cheese on top. (You can place the bagel under a warmer to melt the cheese)
You can serve your steak, egg, and cheese bagel with steakhouse sauce or a sauce of your choice. Enjoy!