Crispy Grilled Cheese Sandwich​ w/ Sauteed Onion

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This isn’t just your mama’s grilled cheese sandwich. This is a crispy, cheesy sandwich with a tiny bit of dijon mustard slapped on top and it tastes like it’s straight from heaven!

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Who loves a nice grilled cheese? If you didn’t raised your hand…then this might not be the post for you. 🙁 If you did raise your hand, I am about to change your life! With this recipe, the grilled cheese sandwich is transformed from “yea they’re good” to “THEY ARE THE BEST SANDWICH EVER!”

This grilled cheese sandwich isn’t just you’re mama’s Sunday afternoon sandwich with white bread and American cheese, though, let’s be honest, there isn’t anything wrong with that. This sandwich has perfectly grilled onions, a blend of cheddar and mozzarella, and, most importantly dijon mustard. I’m tired of talking! Let’s get cooking!! 🙂

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Secret to the Best Grilled Cheese

Mayo! This is the weirdest ingredient ever for grilled cheese but, trust me, it does wonders. Mayo is made up of mostly oil and egg yolks. This means it has a really high fat content…which makes it perfect for grilled cheese. Putting some on the outside instead of butter makes the bread extra crispy and delicious! (yay!:)

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Now, this might seem like an unimportant detail to you but, I swear it’s crucial. When you make this sandwich, cut it into triangles. Something magical happens the second the square bread is cut up into two triangles and it immediately becomes different!

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Grilled Cheese w/ Caramelized Onion and Dijon Mustard Recipe

AuthorbasilanddillDifficultyBeginner

Yields2 Servings
Prep Time10 minsCook Time20 minsTotal Time30 mins

Ingredients
 ½ sweet onion
 1 tbsp oil
 4 slices of bread (your choice)
 2 tbsp mayo
 ½ cup shredded mozzarella
 ¼ cup shredded cheddar cheese
 2 tsp dijon mustard

Directions
1

In a medium saucepan on medium-high heat, heat up a tablespoon of oil. Then saute 1/2 a diced onion until it caramelizes and reaches a golden brown color. Empty the sauteed onions into a bowl and turn the heat down to medium power.

2

While the onions are cooking, spread mayo on both sides of all pieces of bread. Put them all on the hot skillet when the onions are finished cooking. When the underside is golden brown, flip over the bread. Spread a little bit of dijon mustard, add some caramelized onion, and spinkle your desired amount of cheese on each piece of bread. When the underside is almost ready, join two pieces of bread togetherand let the cheeses melt together.

3

Cook both sides of the sandwich until they reach a golden brown color if they haven't already. Then, plate the sandwich, cut into two halves, and serve. Enjoy! <3

Ingredients

Ingredients
 ½ sweet onion
 1 tbsp oil
 4 slices of bread (your choice)
 2 tbsp mayo
 ½ cup shredded mozzarella
 ¼ cup shredded cheddar cheese
 2 tsp dijon mustard

Directions

Directions
1

In a medium saucepan on medium-high heat, heat up a tablespoon of oil. Then saute 1/2 a diced onion until it caramelizes and reaches a golden brown color. Empty the sauteed onions into a bowl and turn the heat down to medium power.

2

While the onions are cooking, spread mayo on both sides of all pieces of bread. Put them all on the hot skillet when the onions are finished cooking. When the underside is golden brown, flip over the bread. Spread a little bit of dijon mustard, add some caramelized onion, and spinkle your desired amount of cheese on each piece of bread. When the underside is almost ready, join two pieces of bread togetherand let the cheeses melt together.

3

Cook both sides of the sandwich until they reach a golden brown color if they haven't already. Then, plate the sandwich, cut into two halves, and serve. Enjoy! <3

Grilled Cheese w/ Caramelized Onion and Dijon Mustard

Notes

  • The amount of cheese you put is honestly really flexible. If you want the sandwich to be more cheesy, add on the cheese. If not, take some out. It’s completely up to you! 🙂
  • Dijon mustard is super important in this recipe! I really love this one by Grey Poupon: