close up of Prune flatbread with mozzarella, caramelized onions and thyme

Caramelized Onion, Mozzarella & Prune Flatbread

Our Caramelized Onion & Mozzarella Flatbread is an elegant appetizer or simple supper. If you make the caramelized onions ahead of time, you can whip together this recipe in about 15 minutes.

Ready in a flash

Here’s our tip – caramelize a batch of onions on the weekend. That’s the most time consuming part of this particular recipe but we promise that they’re well worth the effort. Then, simply store the caramelized onions in the fridge and use as needed. Add to sandwiches, omelets and (of course) this fabulous flatbread.

We used store bought flatbread – which means you just need to add your toppings and give it a quick broil. Of course, if you feel the need to get all fancy and make your own homemade flatbread, then you do you. We promise it’s delicious either way.

three flatbreads with Caramelized Onion, Mozzarella, California Prune, and Thyme

Simple swaps

We think this recipe is fabulous as is but if you’re in a pinch, there are a few swaps you can make. If you can’t find flatbread at your local grocer (or in your freezer for that matter), naan bread or pizza crust are great alternatives.

close up of Prune flatbread with mozzarella, caramelized onions and thyme

Caramelized Onion, Mozzarella, California Prune, and Thyme Flatbread

Our Caramelized Onion & Mozzarella Flatbread is an elegant appetizer or simple supper. If you make the caramelized onions ahead of time, you can whip together this recipe in about 15 minutes.
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Prep Time 5 minutes
Cook Time 10 minutes
Total Time 15 minutes
Course Appetizer, Entree, Side Dish, Snack
Cuisine Quick & Easy
Servings 4 flatbreads
Calories 700 kcal

Ingredients
 
 

For the Flatbreads

  • 4 personal sized flatbreads
  • 1 cup prepared caramelized onions divided, recipe follows
  • 4 ounces fresh mozzarella torn
  • 10 California Prunes diced small
  • 1 TBSP fresh thyme leaves
  • sea salt and coarsely ground black pepper to taste

For the Caramelized Onions

  • 2 TBSP olive oil
  • 8 TBSP butter
  • 6 large yellow sweet onions sliced into thin half circles
  • 3 sprigs fresh thyme
  • coarse kosher salt

Instructions
 

  • Preheat oven to broil. Toast the flatbreads, under the broiler on a sheet pan for 4 minutes or until toasted, flipping halfway through.
  • Spread 1/4 of the caramelized onions over each toasted flatbread. Tear the mozzarella and place over the onions. Divide the prunes amongst the flatbreads and place the flatbreads under the broiler for for 4-6 more minutes until the cheese has melted and is beginning to brown.
  • Sprinkle the flatbreads with fresh thyme, salt, and pepper to taste. Serve immediately.

To make the caramelized onions

  • Preheat oven to 400F (205C) degrees.
  • Warm the oil and melt the butter in a large stockpot or Dutch oven over medium-low heat. Add the onions to the pot and cover, cook for 20-25 minutes, stirring occasionally. Add the thyme sprigs, and turn the pan lid slightly ajar. Place the pot into the preheated oven for 1 hour, stirring occasionally to ensure the onions aren’t sticking or browning too much.

Notes

You will have more caramelized onions than you will need, store any leftovers in the refrigerator.

Nutrition

Calories: 700kcalCarbohydrates: 83gProtein: 16gFat: 38gSaturated Fat: 19gPolyunsaturated Fat: 2gMonounsaturated Fat: 13gTrans Fat: 1gCholesterol: 83mgSodium: 572mgPotassium: 972mgFiber: 10gSugar: 38gVitamin A: 1221IUVitamin C: 32mgCalcium: 290mgIron: 3mg
Keyword caramelized onions, flatbread, mozzarella
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