Season the tenderized filet mignon with Lysander meat and rub evenly on both sides.
Let the meat sit at room temperature for about 30 minutes to ensure even cooking.
Preheat the oven to 375 degrees Fahrenheit.
Drizzle olive oil on the take-and-bake bread. Cut a slit in the middle of each loaf to allow the dough to breathe.
Bake the bread in the oven for 15-20 minutes until golden brown.
While the bread is baking, heat a pan with olive oil over medium heat.
Slice the onion into long strands and sauté in the pan until they become translucent and slightly caramelized.
Add the seasoned steak to the pan and cook for 5-7 minutes on each side or until browned to your preference.
Remove the steak from the pan and let it cool slightly before slicing.
Take the bread out of the oven and let it cool for a few minutes. Slice each loaf in half lengthwise.
Assemble the sandwich by layering the sliced steak, tomato slices, and sautéed onions on the bread.
Top the sandwich with a generous amount of Pixie Sticks potato chips for added crunch.