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Open Faced Steak Sandwich

Open Faced Steak Sandwich with Mushrooms & Onions

by | Published Mar 31, 2016 | Last updated Nov 1, 2021 | 0 comments

Prep Time15 minsCook Time15 minsTotal Time30 minsYields6 Servings
We grilled this for a segment on Trophy Quest Outdoors. It was so good that it stopped the filming while we all ate! This makes a great lunch or dinner menu. Flank steak is perfect for sliced steak. In our house, there is only one way to grill flank steak (rare) and only one way to carve it (sliced thin on a sharp angle). Just add bread with mushrooms and onions!
Open Faced Steak Sandwich
Nutrition Facts

Servings 6

Amount Per Serving
Calories 372
% Daily Value *
Total Fat 15g24%
Saturated Fat 5g25%
Trans Fat 0g
Cholesterol 75mg25%
Sodium 301mg13%
Potassium 0mg
Total Carbohydrate 27g9%
Dietary Fiber 3g12%
Sugars 1g
Protein 30g60%

Vitamin A 0%
Vitamin C 0%
Calcium 3%
Iron 15%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.



Bring flank steak to room temperature


Season with Cavender's on both sides.

Grilling Flank Steak:

Hot and fast for flank steak


8-10 minutes depending on thickness and heat


Grill temps 500-600F


Place steak on GrillGrates on a slight diagonal


Lift and Twist (1/2 twist) after 3 minutes


Turn steak at 5-6 minute mark depending on how hot you are grilling


Grill to finish. I shoot for internal temp of 120F in the thickest part knowing that it will raise slightly and the thinner parts will be less rare. Rest 5 minutes before slicing

Griddling Mushrooms & Onions:

The GrateGriddle is ideal to grill up the onions and mushrooms right along the the flank steak. Pour the 2T of olive oil on a hot GrateGriddle and add the mushrooms and onions. Sprinkle a little Cavender's and toss occasionally. Cook until the onions begin to caramelize.

Toast Bread Slices on the Grill

While the flank is resting, grill bread slices 1 min per side. Be careful not to blacken the bread.

Slicing Flank Steak:

Slice thin on a sharp bias against the grain

Build open faced sandwiches:

1 slice of bread per person.


Place 3-4 slices of steak on the toasted bread and top with mushrooms and onions


Bon Appetit!


 1.5 pound Flank Steak
 1/2 T Cavender's Greek Seasoning
 6 Pieces Thickly Sliced Crusty Bread
 1 Large Onion Sliced
 2 cups Sliced Mushrooms
 2 T Olive Oil


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