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Mediterranean Portobello Beef Burgers
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5 from 2 votes

Mediterranean Portobello Beef Burgers

These Mediterranean Portobello Beef Burgers are a healthy BBQ recipe - topped with garlic and herb cheese, roasted red peppers, arugula and basil mayo, you'll be craving these all week!
Prep Time15 mins
Cook Time15 mins
Total Time30 mins
Course: Burger
Cuisine: Entree
Servings: 4 burgers


  • 2 tbsp olive oil, divided
  • 1/2 block Armstrong garlic and herb cheese, grated
  • 1 red bell pepper, sliced
  • 1 portobello mushroom, sliced
  • 1 medium sized red onion, sliced
  • 1 package Arugula
  • 4 burger buns

Burger patties

  • 1 lb extra-lean ground beef
  • 1 portobello mushroom, finely minced
  • 1 small yellow onion, grated
  • 2 tsp dijon mustard
  • 1 egg
  • 1/3 cup breadcrumbs
  • 2 tsp garlic powder
  • 1 tsp salt
  • 1/2 tsp pepper

Basil mayo

  • 1 cup mayo
  • 1/2 cup fresh basil leaves
  • 1/2 tsp lemon juice


  • Preheat BBQ to med-high heat, and preheat oven to 450 F. Prepare veggies and toss red peppers with a bit of salt and 1 tbsp olive oil. Roast in the oven for 10 minutes.
  • Meanwhile, mix together ingredients for burger patties. Divide mixture into four 1/2-inch thick patties. Brush each with remaining 1 tbsp of olive oil, then place gently on grill.
  • Cook burgers for about 5-6 minutes per side (you'll know they're ready to flip when they easily come unstuck from the grill).
  • Meanwhile, remove red peppers from the oven. Add portobellos and cook another 5 minutes. After that, add red onions and cook another 5 minutes then remove veggies from the oven altogether and set aside.
  • Make basil mayo while everything is cooking by blending mayo, lemon juice and basil together in a Magic Bullet or food processor.
  • In the last two minutes or so of cooking time add garlic herb cheese to burgers and lightly toast buns on the BBQ. Remove and serve burgers topped with roasted veggies, arugula and basil mayo. Enjoy!