This amazing flatbread combines the nuttiness of shitake mushrooms with the sweetness of caramelized red onion and a touch of dijon mustard for some brightness!
Preheat oven to 400°F.
While oven is preheating, bring a skillet to medium high heat and cook mushrooms with 1/2 TBSP olive oil until softened, about 5-8 minutes. If the oil disappears in the pan while cooking, add 1 tbsp water. Once Mushrooms are softened, remove from heat and set aside.
Over medium high heat, add 1/2 tbsp olive oil and red onion and cook until the red onion is softened. Remove from heat and turn off grill.
Using the remaining 1 tbsp olive oil, cover the base of the puff pastry with oil out to the edges. Use a fork to prick the pastry all over to keep it from puffing up too aggressively in the oven.
Add your dijon and garlic to the oiled puff pastry.
Next, evening distribute the mushrooms and red onion. Cover with white cheddar, and then season with fresh thyme, salt and pepper.
Bake in oven for 10-12 minutes until the puff pastry is golden brown.
Remove and let cool completely, roughly 10 minutes, until cutting and serving.