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Low carb burger made with portobello mushroom buns, beef patty, and Mediterranean toppings

Mediterranean Low Carb Burger

By Callie's Recipes
Transform your burger experience with this revolutionary low carb burger that brings a gourmet twist to your healthy eating journey!
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Prep Time 20 minutes
Cook Time 15 minutes
Total Time 35 minutes
Course Lunch
Cuisine American
Servings 4
Calories 425 kcal

Equipment

  • Cast-iron skillet or grill pan
  • Meat thermometer
  • Sharp Knife
  • Large mixing bowl
  • Pastry brush (for olive oil)

Ingredients
  

For the Mushroom Buns:

  • 8 large portobello mushrooms (4-5 inches in diameter)
  • 3 tablespoons extra virgin olive oil
  • 2 cloves garlic, minced
  • 1 teaspoon dried oregano
  • Sea salt and black pepper to taste

For the Burger Patties:

  • 1.5 pounds grass-fed ground beef (80/20 lean-to-fat ratio)
  • 2 tablespoons fresh rosemary, finely chopped
  • 3 cloves garlic, minced
  • 1 tablespoon Worcestershire sauce
  • 1 teaspoon sea salt
  • 1/2 teaspoon black pepper

Mediterranean Toppings:

  • 1 cup crumbled feta cheese
  • 1/2 cup sun-dried tomatoes, chopped
  • 2 cups fresh arugula
  • 1/2 cup kalamata olives, pitted and sliced
  • 1 small red onion, thinly sliced
  • Greek yogurt sauce

Instructions
 

Prepare the Mushrooms:

  • Clean portobello mushrooms gently with a damp paper towel.
  • Remove stems and gently scrape out gills.
  • Mix olive oil with minced garlic and oregano.
  • Brush mushrooms on both sides with the seasoned oil.
  • Season with salt and pepper.

Make the Patties:

  • In a large bowl, combine ground beef, rosemary, garlic, Worcestershire sauce, salt, and pepper.
  • Mix gently with hands until just combined (don't overmix).
  • Form into 4 equal patties, making a slight dimple in the center.
  • Let rest at room temperature for 15 minutes.

Cooking Process:

  • Preheat grill or cast-iron skillet to medium-high heat.
  • Grill mushrooms for 3-4 minutes per side until tender.
  • Cook burger patties for 4-5 minutes per side for medium-rare (internal temperature 135°F).
  • Top with feta cheese during the last minute of cooking.

Assembly:

  • Place a grilled mushroom cap gill-side up.
  • Add a handful of arugula.
  • Place the cheese-topped burger patty.
  • Top with sun-dried tomatoes, olives, and red onion.
  • Add a dollop of Greek yogurt sauce.
  • Crown with the second mushroom cap.

Notes

  • Prepare patties up to 24 hours in advance, keep refrigerated.
  • Store cooked burgers without toppings for up to 3 days.
  • Do not store assembled burgers - components should be stored separately.
  • Mushrooms can be pre-grilled and reheated gently.
Keyword Gluten-free, Keto-friendly, Low-Carb