Jul 14 2026
Restaurants›Merritt Canteen›Portobello Burger Recipe

Portobello Burger Recipe

Inspired by Merritt Canteen
Time30m
Serves2

1/2 angus burger with portobello mushroom sauce, topped with mozzarella cheese on a Portuguese roll

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Ingredients

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Burger Patty

Portobello Mushroom Sauce

Assembly

Method

Cooking the Burger Patty

  1. 1

    Prepare the Patty

    In a mixing bowl, combine the ground Angus beef, salt, and black pepper. Mix gently until just combined. Form the mixture into a patty.

  2. 2

    Cook the Patty

    Heat olive oil in a skillet over medium-high heat. Add the patty and cook for about 4-5 minutes on each side, or until the desired doneness is achieved.

Making the Portobello Mushroom Sauce

  1. 3

    Sauté the Mushrooms

    In the same skillet, add butter and let it melt. Add the minced garlic and portobello mushrooms. Sauté for about 5 minutes, or until the mushrooms are tender.

  2. 4

    Add Flavor

    Stir in the balsamic vinegar and fresh thyme. Cook for an additional 2-3 minutes until the sauce thickens slightly. Remove from heat.

Assembling the Burger

  1. 5

    Prepare the Rolls

    Slice the Portuguese rolls in half. Optionally, toast them on the skillet until golden.

  2. 6

    Build the Burger

    On the bottom half of each roll, place a lettuce leaf followed by a slice of tomato. Add the cooked Angus beef patty on top, spoon over the portobello mushroom sauce, and top with shredded mozzarella cheese.

  3. 7

    Serve

    Cover with the top half of the roll and serve immediately while hot.

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