French Onion Sliced Steak Croissant Sandwich Recipe

Name: French Onion Sliced Steak Croissant Sandwich
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 garlic cloves, minced; 2 tablespoons mccormick's McCormick's Montreal Brand steak seasoning; 1 teaspoon hot sauce; 2 tablespoons Worcestershire sauce; 2 tablespoons red wine vinegar; 5 tablespoons extra virgin olive oil; 2 lbs flank steaks; 2 large yellow onions, thinly sliced; 1 tablespoon fresh thyme leave, chopped; salt; fresh ground black pepper; 1 cup chicken broth; 4 large plain croissants; 4 slices gruyere or 4 slices emmenthaler cheese

Servings: persons

2 garlic cloves, minced
2 tablespoons mccormick's McCormick's Montreal Brand steak seasoning
1 teaspoon hot sauce
2 tablespoons Worcestershire sauce
2 tablespoons red wine vinegar
5 tablespoons extra virgin olive oil
2 lbs flank steaks
2 large yellow onions, thinly sliced
1 tablespoon fresh thyme leave, chopped
salt
fresh ground black pepper
1 cup chicken broth
4 large plain croissants
4 slices gruyere or 4 slices emmenthaler cheese

1
Heat a grill pan or outdoor grill to high; preheat broiler.
2
In a bowl, mix together the garlic, grill seasoning, hot sauce, Worcestershire, and vinegar.
3
Whisk in 3 tablespoons olive oil.
4
Put the flank steak in a shallow dish; pour the marinade over the steak.
5
Toss to coat thoroughly and marinate for 5-10 minutes.
6
While the steak is marinating, heat a large skillet over med-high heat; add in the remaining olive oil.
7
Add in the onions, thyme, salt, and pepper; cook, stirring often, for 7-8 minutes or until the onions are deep golden brown.
8
Add in the chicken stock; continue to cook for 2-3 more minutes or until the chicken stock has almost completely cooked away but the onions are still a little wet with the stock; remove from heat and set aside.
9
Remove the flank steak from the marinade and pat dry.
10
Grill the flank steak for 6-7 minutes on each side; remove steak from the grill to a cutting board; cover loosely with foil and let rest 5 minutes.
11
Thinly slice the steak on an angle, against the grain.
12
Split the croissants in half and place on a cookie sheet, cut sides up.
13
Pile some of the onions on the bottoms of each croissant.
14
Arrange a pile of the sliced steak on top of the onions and then follow that with some more onions.
15
Place slices of cheese on top and transfer both the croissant bottoms and tops to the broiler.
16
Melt the cheese and toast the cut sides of the tops 1-2 minutes.
17
Place the croissant tops on the melted cheese; serve immediately.

1126

kcal

Calories

Fat

Carbs

Protein

Fat Carbs Protein

* Per serving · 4 servings · Values may vary.

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Preheat the oven fully and bake on the middle rack for the most even results.
Check for doneness a few minutes early — a toothpick in the center should come out with just a few moist crumbs.
Let it cool before slicing so it sets properly and holds its shape.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Feel free to swap in similar ingredients you already have on hand and adjust seasoning to taste.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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How did you like this recipe?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

You need 14 ingredients. The key ingredients include: 2 garlic cloves, minced, 2 tablespoons mccormick's McCormick's Montreal Brand steak seasoning, 1 teaspoon hot sauce, 2 tablespoons Worcestershire sauce, and more.

Yes, French Onion Sliced Steak Croissant Sandwich falls under the Baking & Desserts category and is a great choice for this type of meal.

Store in an airtight container at room temperature for up to 3–5 days. For longer storage, freeze for up to 3 months — no need to refrigerate or reheat.

That's it — enjoy your meal!

French Onion Sliced Steak Croissant Sandwich

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions