Cheesy mushroom toast with mustard and thyme

Quick and easy cheesy mushroom toast recipe! Sauteed mushrooms on toast with Maille Old Style Mustard, fresh thyme, and melted swiss cheese. A hearty, savory vegetarian meal.

This mushroom toast recipe is sponsored by Maille. All opinions are my own. Thank you for supporting the brands that support Rhubarbarians!

Hi, Rhubarbarians! Today’s recipe is loaded with one of my favorite veggies: mushrooms. This mushroom toast is hearty, savory, full of umami, and can be served as an appetizer, snack, or even a full meal.

Mushroom toast is a very simple and easy to throw together meal, perfect for a hearty or lunch or light dinner.

Looking for more mushroom recipes?

Cauliflower quinoa burgers with mushrooms and onions

Cheese tortellini with caramelized onion sauce

Stacked ale mushrooms with arugula and goat cheese

Maille Old Style Mustard

A key ingredient to this simple mushroom toast is Maille old style mustard. I love the grainy texture and the intense flavor of this mustard. It compliments the earthiness of the mushrooms perfectly by adding some tang and acidity, and adds a whole new dimension to the flavor of simple mushrooms on toast!

Just a spoonful of this mustard goes a long way and can add so much flavor to your dressings or dishes.

More ways to add flavor with a spoonful of dijon mustard:

Pear and apple spinach salad with honey mustard dressing

Roasted vegetable galette

Vegetarian white bean cassoulet

What is mushrooms on toast?

Mushrooms on toast is a simple dish from Britain. It is traditionally kept very simple, just sauteeing up some mushrooms and eating them atop toast. It’s eaten as a filling snack or a light meal rather than an entree.

This mushroom toast is a bit different than the traditional British meal. I add lots of flavor with swiss cheese, dijon mustard, and fresh thyme. I also broil the mushrooms and cheese over the bread and toast the whole thing together.

How to make mushroom toast

Mushroom toast is amazingly simple, but loaded with flavor. Since there are so few ingredients, you’ll want to choose very high quality produce and products. Very fresh baby bella or cremini mushrooms, rustic bread with a hearty crust, whole grain dijon mustard like Maille old style mustard, and aged swiss cheese.

Chop your mushrooms and garlic and heat up a frying pan. Melt the butter and sweat the mushrooms. Add the garlic and saute together until the mushrooms are very brown and starting to crisp.

Turn on the broiler and build your mushroom toast. Spread the mustard on the bread, top with a bit of cheese, top with mustard, then top with more cheese. Broil until the cheese is melted and starting to brown. Sprinkle with fresh thyme, salt, and pepper.

How to serve mushrooms on toast as an appetizer

Mushroom toast makes an amazing appetizer! Think: mushroom crostini.

Just replace the bread in this recipe with baguette slices. You should be able to make about 8 mushroom crostinis just using smaller slices of bread. All of the ingredients will stay the same.

How to make mushroom toast a full meal

These mushroom toasts are rather large, and 2 of them could easily fill you up. The recipe in itself is much like an open faced mushroom melt or warm open faced mushroom sandwich.

1. Top with arugula to add some greens to the dish
2. Add a layer of cannellini beans before adding the mushrooms.
3. Top with an additional slice of bread to make a sandwich
4. Add some walnuts to your sauteed mushrooms

Cheesy mushroom toast with Maille old style mustard and thyme recipe

5 from 6 votes

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Cheesy mushroom toast with Maille old style mustard and thyme

Prep Time

5 mins

Cook Time

25 mins

Total Time

30 mins

 

Quick and easy cheesy mushroom toast recipe! Sauteed mushrooms on toast with mustard, fresh thyme, and melted swiss cheese. A hearty, savory vegetarian meal.

Course: Appetizer, Main Course, Snack

Cuisine: American, British

Keyword: vegetarian

Servings: 2 toasts

Calories: 540 kcal

Author: Trish Bozeman

Ingredients

• 2 Tbsp butter
• 4 cups sliced baby bella or cremini mushrooms
• 3 cloves garlic, minced
• 2 slices thick rustic french bread
• 2 Tbsp Maille old style mustard
• 1 cup shredded swiss cheese
• 1 tsp fresh thyme leaves
• salt and pepper

Instructions

1. Melt the butter in a sauce pan over medium high heat. Add the mushrooms and sweat, stirring occasionally, about 5 minutes. Add the garlic and saute, stirring often, about 15 minutes until mushrooms are browned and all liquid has evaporated.

2. Preheat the broiler. Spread the mustard evenly on one side of each piece of bread. Top each slice with a sprinkle of cheese. Evenly top with the mushrooms and then top each with another generous sprinkle of cheese. Broil until the cheese is melted and starting to brown, about 2 minutes.*

3. To serve, sprinkle with fresh thyme and season with salt and pepper.

Recipe Notes

*You’ll want to watch the cheese to make sure it doesn’t burn under the broiler. Cook times will vary.

Nutrition Facts

Cheesy mushroom toast with Maille old style mustard and thyme

Amount Per Serving

Calories 540 Calories from Fat 252

% Daily Value*

Fat 28g43%

Saturated Fat 17g85%

Cholesterol 80mg27%

Sodium 713mg30%

Potassium 807mg23%

Carbohydrates 47g16%

Fiber 2g8%

Sugar 5g6%

Protein 26g52%

Vitamin A 805IU16%

Vitamin C 2.1mg3%

Calcium 498mg50%

Iron 3.2mg18%

* Percent Daily Values are based on a 2000 calorie diet.

Year’s Supply of Maille Giveaway!

Thank you Maille for sponsoring this post! Thank you, Rhubarbarians, for supporting the brands that I love.

I hope you’ll give this cheesy mushroom toast a try! Snap a pic and give me a shout on social media! #Rhubarbarians #MyMaille

Trish

P.S. Want to see what I’m cooking up this week? Check out my Instagram stories! And don’t forget to join my FaceBook community of vegetarian cooks!

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