Impress your friends with this decadent and garlicky appetizer that’s easy to share with a crowd.
Melt the butter in a large frying pan over medium heat. Add the sliced onion and dried thyme.
Drizzle the olive oil into the pan and increase heat to medium-high. Add the sliced mushrooms in a single layer.
Prick the center of the dough with a fork a few times to prevent it from puffing up too much.