8ozwhite or cremini mushrooms, sliced (standard tray)
1-2teaspoonsbutter, optional
Pinchminced garlic, optional
1/4-1/3cuponion, sliced
3slicescheddar cheese, or cheese of your choice (or shredded cheese)
Salt and freshly ground pepper
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Instructions
Add the sliced mushrooms to a dry, non-stick skillet over medium heat. Cook, stirring occasionally until golden. Season with a bit of salt and pepper and if using, stir in the butter and/or garlic once cooked. Remove to a bowl.
In the same skillet, add a splash of cooking oil and add the onions. Cook over medium heat, stirring, until softened and browned. Remove to the bowl with the mushrooms.
Heat the oven broiler. Place the bread slices onto a baking sheet. Toast the bread under the broiler, ON BOTH SIDES, until golden. Remove from the oven but leave the broiler on.
Assemble the sandwiches by first adding a layer of sliced tomatoes. Season with a bit of salt and pepper and drizzle with some olive oil. Top the tomatoes with the mushroom and onion mixture. Finally, top with sliced cheese.
Adjust the oven rack to about 6-inches from the broiler (usually the 2nd rung from the top). Place the assembled sandwiches under the broiler and cook until warmed and the cheese is melted and bubbly.
Notes
Be sure to toast the bread well on both sides, so it won't get soggy when topped with the moist tomatoes.
Be sure to season the tomatoes and the mushrooms as you cook them, to really bring out all the great flavours.
I kept the cheese topping thinner for photographing, so the ingredients underneath could be seen. Feel free to add more cheese if you like!
Be sure to read the notes above this Recipe Card, for more tips on making this recipe. You'll also find step-by-step photos there that you might find helpful.