July 7, 2026 · 20 min

Caramelized Onion and Mushroom Flatbreads with Roasted Garlic Spread and Fresh Thyme

Lunch20 min2560 cal / serving

These flatbreads are perfect for a fun and flavorful dinner. The combination of sweet caramelized onions, earthy mushrooms and creamy cheeses on a crispy crust is simply irresistible.

Start by preparing the dough and caramelizing the onions and mushrooms. Then, assemble the flatbreads with a roasted garlic spread, mozzarella and feta. Bake until golden and finish with fresh thyme for a beautiful presentation.


Recipe details

Lunch20 min2560 cal / serving2 servings

Nutrition per serving

Calories2560 kcalProtein27.7 gFat226 gCarbs111.3 gSugar67.6 gFiber4.9 gSodium1668 mg

Dietary labels

Gluten-free: noLactose-free: noDairy-free: no

Allergen check

Gluten / wheat: containsMilk / dairy: containsEgg: not detectedFish: not detectedShellfish: not detectedPeanut: not detectedTree nuts: not detectedSoy: not detectedSesame: not detectedMustard: not detectedCelery: not detectedSulphites: not detectedLupin: not detectedMolluscs: not detected

Values are calculated per serving from ingredient amounts and the ingredient nutrition reference per 100g. Allergen and diet labels use available ingredient metadata and name matching; always check product labels for strict diets or allergies. Some ingredient amounts or nutrition values were incomplete, so this is marked as a partial estimate.


Ingredients

Feta Cheese0.5 cup Feta CheeseView ingredient guide
Thyme0.25 ounce ThymeView ingredient guide
Onion1 unit OnionView ingredient guide
Mozzarella Cheese1 cup Mozzarella CheeseView ingredient guide
Cremini Mushrooms8 ounce Cremini MushroomsView ingredient guide
Pizza Dough2 unit Pizza DoughView ingredient guide
Garlic Powder1 teaspoon Garlic PowderView ingredient guide
Flour0.5 cup FlourView ingredient guide
Saltteaspoon (tsp) SaltView ingredient guide
Sugar1 teaspoon (tsp) SugarView ingredient guide
Olive Oil2 teaspoon (tsp) Olive OilView ingredient guide
Cooking Oil2 teaspoon (tsp) Cooking OilView ingredient guide
Black Pepperteaspoon (tsp) Black PepperView ingredient guide

Instructions

  1. Adjust rack to top position (top and middle positions for 4 servings) and preheat oven to 475°F. Wash and dry produce. Sprinkle 3 TBSP flour over a clean work surface. Remove pizza dough from packaging and place on floured surface. Shape each piece of dough into a ball. TIP: Spray your hands with nonstick cooking spray or dust with flour to prevent sticking. Evenly sprinkle dough balls with 2 TBSP flour. Cover with a clean kitchen towel and let rest at room temperature for 20 minutes.
  2. While dough rests, halve, peel and thinly slice onion. Trim and thinly slice mushrooms (skip if your mushrooms are pre-sliced!). Strip thyme leaves from stems; discard stems and roughly chop half the leaves (reserve remaining thyme for garnish).
  3. Heat a large drizzle of oil in a large, preferably nonstick, pan over medium-high heat. Add onion; season with salt and pepper. Cook, stirring occasionally, until lightly browned, 3-4 minutes. Add mushrooms and chopped thyme; season with salt and pepper. Cook, stirring occasionally, until veggies are softened, 5 minutes. TIP: If pan looks dry, add another drizzle of oil. Add garlic powder, 1 tsp sugar (2 tsp for 4 servings) and ¼ cup water. Cook, stirring occasionally, until onion is 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.)
  4. Once dough has rested 20 minutes, line a baking sheet (two baking sheets for 4 servings) with parchment paper. Carefully press and stretch each dough ball into a rough oval shape and place on one side of prepared sheet (you’ll have two dough ovals per sheet). TIP: If needed, use a rolling pin to help roll out dough. Cover dough with a clean kitchen towel and let rest 15 minutes. (This will make stretching the dough into a larger shape even easier!)
  5. Use floured hands to press and stretch dough on baking sheet into larger oval shapes, about 10 inches long and 5-6 inches wide. Evenly spread dough with roasted onion and garlic spread, leaving a 1-inch border. Sprinkle with mozzarella. Top with caramelized onion and mushroom mixture and feta. Drizzle or brush edges of dough with olive oil.
  6. Bake flatbreads on top rack until crusts are golden brown and crisp, 14-18 minutes. (For 4 servings, bake on top and middle racks, swapping rack positions halfway through.)
  7. Sprinkle reserved thyme leaves over flatbreads. Slice as desired and serve.

Recipe Tips

For easier handling, lightly oil your hands or dust with flour when stretching the dough.

If you don’t have roasted onion and garlic spread, you can substitute with a mixture of caramelized onions and roasted garlic paste.

Let the flatbreads cool for a minute or two before slicing to keep the toppings in place.

FAQ

Can I use store-bought pizza dough instead of the provided dough?

Yes, you can use any pizza dough you prefer. Just follow the same stretching and resting instructions.

What can I substitute for feta cheese?

You can use goat cheese or grated Parmesan for a different flavor.

How do I store leftovers?

Store leftover flatbreads in an airtight container in the refrigerator for up to 3 days. Reheat in the oven or toaster oven for best results.

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