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Nutty oat burgers with portobello caps. | joeshealthymeals.com

Nutty Oat Burgers on Portobello Caps

Tasty vegetarian burger that is surprisingly good.
Course Main dish
Cuisine American
Keyword oat burgers, oat burgers on portobello
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 4 servings
Calories 502kcal
Author Joe Boyle



  • 4 medium sized portobello caps , stems removed
  • 1 tbsp olive oil
  • salt and pepper

Nutty oat burger

  • 2 cups quick oats
  • 1/3 cup toasted walnuts , chopped
  • 1/3 cup sunflower seeds
  • 1/2 medium onion , grated
  • 1 tsp Lawry's seasoned salt
  • 1/4 cup vegetable oil
  • 2 eggs , beaten


  • 2 tbsp mayonnaise
  • 2 tbsp yellow mustard
  • 2 tbsp ketchup
  • Leaf lettuce
  • Sliced tomatoes
  • Sliced red onion
  • Dill pickles


  • Pre-heat oven to 400° F
  • Line a sheet pan with parchment and spray the parchment lightly with cooking spray.
  • Drizzle olive oil on both sides of the caps and season with a little salt and pepper
  • Bake for 15 to 20 minutes until the caps have softened.
  • Remove from the oven and keep warm until served
  • Mix all the ingredients for the oat burgers in a bowl, let rest 10 minutes, then form into patties.
  • Coat the bottom of a skillet with vegetable oil on medium heat and fry both sides of the burgers 3 to 4 minutes until nicely browned.
  • Mix the mayonnaise, mustard and ketchup in a small bowl.
  • Assemble the open-faced nutty oat burger on a plate with the lettuce, tomato, onion and pickles, and serve with the mayo sauce


Calories: 502kcal