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1
For the steak: Combine the red wine, Worcestershire sauce, soy sauce, seasoned salt, and a dash or two of salt and pepper in a small bowl and mix well.
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2
Place the steak in a container (or freezer bag) and pour in the marinade.
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3
Seal the container, put it in the fridge and let it marinate overnight.
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4
Preheat oven to 300 F.
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5
Heat an oven-safe skillet or enamel pot (use one with a lid because youll need it in a few minutes) on medium-high heat.
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6
Add the grapeseed oil and let it get good and hot.
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7
Sear the steak on both sides for 3-4 minutes.
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8
Remove from heat and add the lid.
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9
Put it in the 300 F oven and cook for 4 plus hours.
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10
Remove from oven and set aside.
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11
For the caramelized onions: Heat a skillet on medium-high heat.
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12
Add the canola oil and butter and warm.
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13
Drop in the onions.
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14
Stir frequently and cook for 25 30 minutes.
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15
Once the onions are caramelized, remove from heat and set aside.
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16
For the sandwich assembly: Heat oven to 275 F. Slice the rolls in half.
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17
Thinly slice the steak.
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18
Place a couple of slices of the cheese on the bottom of each roll.
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19
Add a decent size slice of flank steak and top with a good amount of the onions.
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20
Add the top of each bun and place sandwiches on a baking tray.
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21
Place in a 275 F oven and cook for 5 minutes or so.
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22
You just want to cook to get a good melt on the cheese.
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23
Serve and enjoy!
