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Grilled Cheese with Caramelized Onions and Spinach

1 April, 2015 by Tara 10 Comments

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Grilled Cheese with Caramelized Onions and Spinach recipe for #FoodieExtravaganza’s Grilled Cheese event! This grilled cheese sandwich is packed with caramelized onions, greens, and melty Cheddar cheese for a decadent addition to lunch.

Two stacked slices of Grilled Cheese with Caramelized Onions and Spinach.

Foodie Extravaganza

Foodie Extravaganza is a monthly party hosted by bloggers who love food! Each month we incorporate one main ingredient or theme from The Nibble into recipes to share with you and Lauren of From Gate to Plate chose to celebrate Grilled Cheese for today’s event! Other foods celebrated this month include Coffee Cake, Mushroom, Raisin, Soft Pretzel, Chocolate Mousse, Garlic, Pecan, Cheese Fondue, and Caramel.

#FoodieExtravaganza Logo: Foodie Extravaganza with outline of cupcake and pink scalloped border.

Posting day is always the first Wednesday of each month. If you are a blogger and would like to join our group and blog along with us, come join our Facebook page Foodie Extravaganza. We would love to have you! If you’re a spectator looking for delicious tid-bits check out our Foodie Extravaganza Pinterest Board! 

Grilled Cheese with Caramelized Onions and Spinach

Layering grilled cheese with slices of cheese and chopped spinach.

I haven’t gotten a chance to participate in FoodieExtravaganza since November (I made Hong Kong French Toast), but I am glad to join this month with Grilled Cheese with Caramelized Onions and Spinach. I had a the ingredients on hand and it was great as a quick lunch.

The caramelized onions can be prepared up to two days in advanced. Once caramelized, transfer to a bowl, cover, and refrigerate until ready to use.

I used Cheddar cheese, but would love to try this again with Gruyere.

If you want to serve all the sandwiches warm at once, keep the cooked ones on a baking sheet in a 200˚F oven as you are cooking the others.

When toasting the grilled cheese, adjust the temperature as needed between low and medium low. You want the bread toasted, but need to give the cheese time to melt before the bread burns.

Grilled Cheese with Caramelized Onions and Spinach with mayonnaise in background.

Check out what everyone else prepared:

  • Bacon Apple Mascarpone Grilled Cheese from Sew You Think You Can Cook
  • Caramelized Onion Bacon Grilled Cheese from Making Miracles
  • Chicken Cordon Bleu Grilled Cheese from Rae Gun Ramblings
  • Crusty Griddle Baked Quesadillas with Poblano Rajas from A Day in the Life on the Farm
  • Grilled Cheese in the Garden from Culinary Adventures with Camilla
  • Grilled Cheese with Caramelized Onions and Spinach from Tara’s Multicultural Table
  • Muffuletta Grilled Cheese from Food Lust People Love
  • Southern Grilled Cheese from The Freshman Cook
  • Spicy Pear Grilled Cheese from Passion Kneaded

Grilled Cheese with Caramelized Onions and Spinach cut in half.

Grilled Cheese with Caramelized Onions and Spinach Recipe

Adapted from Simply Reem

Two stacked slices of Grilled Cheese with Caramelized Onions and Spinach.
Print Pin

Grilled Cheese with Caramelized Onions and Spinach

Grilled Cheese with Caramelized Onions and Spinach recipe! This grilled cheese sandwich is packed with caramelized onions, greens, and melty Cheddar cheese for a decadent addition to lunch.
Course Main
Cuisine N/A
Keyword caramelized onion, grilled cheese, onion, sandwich, spinach
Prep Time 10 minutes
Cook Time 40 minutes
0 minutes
Total Time 50 minutes
Servings 4 Sandwiches

Ingredients

  • 1 1/2 tablespoons vegetable oil
  • 2 medium red onions thinly sliced
  • Salt and pepper to taste
  • 8 slices sourdough or country bread
  • 2 tablespoons butter
  • 8 ounces Cheddar cheese sliced
  • 2 cups baby spinach leaves
  • 1/2 teaspoon red pepper flakes if desired
  • 1/3 cup mayonnaise

Instructions

  • In a large pan, drizzle oil over medium low heat. Once heated, add the sliced onions. Reduce heat to low and cook, stirring occasionally, until a deep purple and caramelized, about 30 minutes. Sprinkle with salt and pepper. Transfer to a medium bowl and allow to cool.
  • Place a large skillet over medium low heat.
  • Spread butter over one side of each slice of bread. Cover half of the bread slices with a layer of cheese on the buttered side. Cover the cheese with a thin layer of caramelized onions and a few spinach leaves. If desired, season with some red pepper flakes. Top with another layer of cheese, then the remaining bread slices, butter side touching the cheese. Spread the top of each sandwich with mayonnaise.
  • Place a sandwich on the heated skillet, mayonnaise coated side down. Spread mayonnaise on the top of the sandwich. Cook until the bottom layer of cheese is melted and bread is golden brown. Flip and cook other side until melted and golden brown.
  • Serve immediately and repeat with remaining sandwiches.
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Filed Under: Bread, Pizza/Sandwiches/Wraps Tagged With: cheddar, cheese, grilled cheese, onion, spinach

Previous Post: « Paashaasbroodjes (Easter Bunny Bread)
Next Post: Orange Almond Cupcakes »

Reader Interactions

Comments

  1. Stacy

    1 April, 2015 at 5:44 am

    Oh, I remember those toddler days well, and it’s been almost 20 years since my little one was two. She threw a snit once when her aunt broke a muffin in two, thinking it would be easier for her to handle. Ain’t no fixing that either. 🙂
    Beautiful melty sandwich, Tara! Caramelized onions and cheese are wonderful together.

    Reply
  2. Carlee @cookingwithcarlee

    1 April, 2015 at 11:35 am

    My toddler prefers his bread and cheese in the pre-cooked stage too! I loved the caramelized onions in the grilled cheese. Next time I make a big batch I will have to save some!

    Reply
  3. Wendy, A Day in the Life on the Farm

    1 April, 2015 at 12:55 pm

    These stories are what great memories are made of….you can tell his son how he wanted the cheese fixed when it melted. Your photos are mouthwatering by the way.

    Reply
  4. Tara

    2 April, 2015 at 10:59 am

    Thanks everyone! Haha, I will have to try calling them cheese bread next time.

    Reply
  5. Teri@The Freshman Cook

    2 April, 2015 at 10:17 pm

    I love the combo of the carmelized onions and the cheese with the spinach. YUM! Plus, great pics!

    Reply
  6. Kelster

    5 April, 2015 at 12:40 am

    Love the look of that melted cheese! I’m definitely laughing at being asked to fix the cheese.

    Reply
  7. Kathleen @ Fearlessly Creative Mammas

    5 April, 2015 at 5:52 pm

    I love caramelized onions! What a great idea to add them to your grilled cheese recipe! Your sandwich sounds so good!

    Reply
  8. lk529

    5 April, 2015 at 6:02 pm

    Your sandwich looks gourmet! All that melt-y cheese. And caramelized onions.

    Reply
  9. jacklynd0239

    7 April, 2015 at 9:46 am

    Wow, what a gorgeous grilled cheese! I love the combination of ingredients.

    Reply
  10. Tara

    19 April, 2015 at 9:10 am

    Thanks!

    Reply

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