Simple Mushroom Sandwiches

Slice the button mushrooms into ¼-inch thick pieces, then dice the onion into small pieces.

Heat a skillet or saucepan over medium-high heat and add the mushrooms and diced onion.

Cook the mushrooms and onion, stirring occasionally, until the mushrooms begin to release their liquid and the onions soften.

Pour in the red wine and stir to combine, scraping any browned bits from the bottom of the pan.

Simmer the mushroom mixture until the red wine reduces by half and the liquid has thickened slightly, about 5-7 minutes.

Season the mushroom mixture with salt and pepper to taste.

Toast the whole wheat bread slices lightly if desired, then divide the cooked mushroom mixture evenly among the slices.

Serve the mushroom sandwiches warm, spooning any remaining sauce from the pan onto each sandwich if needed.