French Onion Chicken Sandwich

This French Onion Chicken Sandwich has juicy grilled chicken topped with melted Swiss cheese, caramelized onions, and fresh baby spinach on a lightly toasted deli sandwich bun. 

These sandwiches are easy and delicious and this recipe for two makes a great lunch, dinner, or fun date night meal idea.

The chicken can also be pan fried or broiled if you would rather not grill it.

My husband added horseradish sauce to his sandwich to kick it up a notch and loved it.

Don’t be afraid to experiment with customizing this sandwich to your personal taste.

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How to make French Onion Chicken Sandwiches

Slice the onion and separate it into rings.

In a large skillet, heat the oil over medium-low heat.

Add onion, sugar, onion powder, and garlic powder. Cook and stir often, about 20 minutes, or until onions are soft and caramelized.

Turn the heat to low and cover to keep warm.

Preheat the grill for direct grilling over medium-high heat.

Place the two pieces of chicken between two sheets of plastic wrap and pound them flat with a meat mallet. Click for a meat mallet.

Transfer the chicken to the hot grill rack.

Close the lid and cook for about 5-7 minutes.

Optional – place the sandwich rolls on the grill to toast the insides just until lightly browned. Move them to the top warming rack to keep warm while the chicken finishes cooking.

Flip the chicken over and cook another 5-7 minutes or until the chicken loses its pink color throughout and the internal temperature reaches 160 degrees F.

Place the Swiss cheese slices on top of the chicken pieces.

Close the lid and cook for 1 minute or until cheese begins to melt.

Assemble the sandwiches using sandwich buns, spinach, chicken with Swiss cheese, and caramelized onions.

Serve and enjoy!

You may also enjoy

• Crockpot French Onion Soup
• Tuscan Chicken Sandwich
• Chicken Spinach Sandwich
• Fried Chicken Bacon Sandwich

French Onion Chicken Sandwich

Zona House

These Grilled French Onion Chicken Sandwiches have juicy grilled chicken topped with melted Swiss cheese, caramelized onions, and fresh baby spinach on a lightly toasted deli sandwich bun. Ready in 35 minutes!

5 from 4 votes

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Prep Time 5 minutes mins

Cook Time 30 minutes mins

Total Time 35 minutes mins

Course Chicken-Poultry

Cuisine American

Servings 2

Calories 606 kcal

Equipment

• Spring Chef Meat Tenderizer, Heavy Duty Hammer Mallet Tool & Chicken Pounder, Black

Cook ModePrevent your screen from going dark

Ingredients

1x2x3x

US CustomaryMetric

• ▢ 2 Tbsp extra virgin olive oil
• ▢ 1 small yellow onion
• ▢ 1 tsp granulated sugar
• ▢ ½ tsp onion powder
• ▢ ½ tsp garlic powder
• ▢ 2 boneless skinless chicken filets (4oz each)
• ▢ 2 slices Swiss cheese
• ▢ 2 hamburger buns (or deli sandwich buns)
• ▢ 1 cup baby spinach

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Instructions

 

• Slice the onion and separate into rings.
• In large skillet, heat the oil over medium-low heat.
• Add onion, sugar, onion powder, and garlic powder. Cook and stir often, about 20 minutes or until onions are soft and caramelized.
• Turn the heat to low and cover to keep warm.
• Preheat the grill for direct grilling over medium-high heat.
• Place the two pieces of chicken between two sheets of plastic wrap and pound flat with a meat mallet. Click for a meat mallet.
• Transfer the chicken to the hot grill rack.
• Close the lid and cook about 5-7 minutes.
• Optional – place the sandwich rolls on the grill to toast the insides just until lightly browned. Move them to the top warming rack to keep warm while the chicken finishes cooking.
• Flip the chicken over and cook another 5-7 minutes or until chicken loses its pink color throughout and internal temperature reaches 160 degrees F (71.11 C).
• Place the Swiss cheese slices on top of the chicken pieces.
• Close the lid and cook 1 minute or until cheese begins to melt.
• Assemble the sandwiches using sandwich buns, spinach, chicken with Swiss cheese and caramelized onions.

Video

Notes

• The chicken can also be pan fried or broiled if you would rather not grill it.
• Try adding horseradish sauce to this sandwich to kick it up a notch. Don’t be afraid to experiment with customizing this sandwich to your personal taste.

Nutrition

Serving: 1Calories: 606kcalCarbohydrates: 30gProtein: 58gFat: 27gSaturated Fat: 7gPolyunsaturated Fat: 3gMonounsaturated Fat: 14gTrans Fat: 0.03gCholesterol: 160mgSodium: 521mgPotassium: 1079mgFiber: 2gSugar: 8gVitamin A: 1617IUVitamin C: 12mgCalcium: 255mgIron: 3mg

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Hi and welcome. I’m Zona and I have a passion for recipes. I share recipes, tips, tricks, and resources to help you cook for two. Eat, drink, and enjoy!