Caramelized Onion & Mushroom Flatbreads
with Balsamic Arugula Salad
- Wheat
- Sesame
- Eggs
- Milk
Crispy flatbreads topped with melty mozzarella, jammy caramelized onion, and savory sautéed mushrooms make for a quick and easy meal that’s perfect any time of day. A bright, peppery arugula salad tossed with creamy, tangy balsamic dressing adds fresh balance and pop of vibrant color—all in a speedy 25 minutes!
Ingredients
1 unit
Onion
2 unit
Flatbreads
(Contains: Wheat, Sesame)
2 ounce
Arugula
1.5 ounce
Creamy Balsamic Dressing
(Contains: Eggs)
1 cup
Mozzarella Cheese
(Contains: Milk)
4 ounce
Button Mushrooms
Not included in your delivery
Salt
Pepper
Cooking Oil
Olive Oil
Sugar
Nutrition Values
Utensils
Cooking Steps
• Adjust rack to top position (top and middle positions for 4 servings) and preheat oven to 450 degrees. Wash and dry produce. • Halve, peel, and thinly slice onion. Trim and thinly slice mushrooms (skip if your mushrooms are pre-sliced!).
• Heat a large drizzle of oil in a large, preferably nonstick, pan over medium-high heat. Add onion; cook, stirring occasionally, until lightly browned, 3-4 minutes. • Add mushrooms; cook, stirring occasionally, until veggies are softened, 5 minutes. • Add 1 tsp sugar (2 tsp for 4 servings) and a splash of water; cook until onions are jammy and caramelized and mushrooms are browned and tender, 2-3 minutes more. Season with salt and pepper. (For 4, you may need to work in batches.)
• Meanwhile, place flatbreads (dimpled sides down) on a baking sheet. Brush or rub each flatbread with a drizzle of olive oil; lightly season with salt and pepper. (For 4 servings, divide flatbreads between two sheets.) • Toast on top rack until golden brown, 3-5 minutes. (For 4, toast on top and middle racks, swapping rack positions halfway through.)
• Once flatbreads are toasted, remove sheet from oven. Carefully flip (dimpled sides up) and sprinkle with mozzarella. Top with caramelized onion and mushrooms. • Return to top rack and bake until cheese melts, 4-6 minutes. (For 4 servings, bake on top and middle racks, swapping rack positions halfway through.)
• Meanwhile, in a large bowl, toss arugula with as much creamy balsamic dressing as you like. • Taste and season with salt if desired.
• Cut flatbreads into pieces. • Divide flatbreads between plates and top with as much salad as you like. Serve with any remaining salad on the side.
Customer reviews
Review summary
Updated on Sep 2026- Flavor: The caramelized onion and mushroom topping is rich and savory, though some found the overall flatbread a bit one-note and felt it needed more seasoning or a bolder sauce.
- Ease of prep: This comes together quickly, but note that truly caramelizing the onions takes longer than the recipe suggests — budget extra time for the best results.
- Suggestions: Add garlic, Italian seasoning, or a drizzle of balsamic glaze to boost flavor; several reviewers also had great results adding pepperoni or Italian sausage for more depth.
- Portions: Many felt the mushroom and onion topping was too sparse for the size of the flatbreads — use a generous hand when spreading toppings for better coverage.
- Arugula: The peppery arugula salad on top added freshness and crunch, though some preferred less dressing or a lighter vinaigrette instead of the creamy balsamic.
Reviews from our home cooks
The easy recipes have really been knocking it out of the park lately. This was delicious and I really liked the cream cheese layer. The balsamic salad on top of the flatbread added a nice hit of freshness and crunch. Loved this one! Keep it in the mix!
I didn't care for the arugula Salad, it was bitter. The dressing saved it a little bit. But the onion and mushroom flatbread was very good, only problem was that there wasn't more. I would definitely make it again. I even saved the recipe card.
Super tasty. I spent an hour to actually caramelize the onions, and added fresh sliced tomatoes as well. There was enough cheese and the arugula and dressing on top was delicious!
Enjoyed this more than expected. I did feel like I had way more onion than mushroom and wished I had a better ratio.
This is good but for once in my life it was actually not enough leaves and too much dressing. Frankly could've used 2 bags of arugula. Also didn't think the dressing itself was as good as everything else. But everything else was very good!
So good but it needed a couple more mushrooms. I didn't use the dressing. I would order again.
I'm not sure what felt like it was missing. Maybe the onions and mushrooms needed something to make them more flavorful. The cheese and mozzarella was kind of bland. Maybe a stronger cheese would punch the flavor up.
Delicious but wish there was more variety of greens. Not crazy about arugula but don't mind it mixed with other greens.
Loved the recipe, but is there any way we could make the recipe cards a little more ADD-friendly? Maybe a color-coding system for specific ingredients or steps?
It helped to heat the tortilla in the toaster oven to make it crispy.
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