How to make it
7 steps. Take it one step at a time.
Melt the butter in a large skillet
Melt the butter in a large skillet over medium heat. Add the diced onion and sauté until translucent, about 3-4 minutes.
4 minAdd the grated mushrooms
Add the grated mushrooms to the skillet. Cook, stirring occasionally, until all the liquid released by the mushrooms has evaporated and they are slightly browned. Season with salt and black pepper.
8 minPreheat your oven
Preheat your oven to 400°F (204°C). Cut the baguette in half lengthwise and then into shorter sections if desired.
Spread the mushroom and onion mixture evenly
Spread the mushroom and onion mixture evenly over the cut sides of the baguette halves.
Top the mushrooms
Top the mushrooms with a generous layer of shredded cheese.
Place the sandwiches
Place the sandwiches on a baking sheet and bake for about 8-10 minutes, or until the cheese is melted and bubbly and the edges of the bread are crisp.
10 minRemove from the oven and immediately drizzle
Remove from the oven and immediately drizzle with ketchup in a zig-zag pattern. Serve hot.
A little kitchen wisdom
Traditionally served with a simple tomato ketchup. For a modern twist, you can add chives or a garlic sauce drizzle. Use a crusty baguette that can hold the weight of the mushroom mixture.
