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Nutty oat burgers with portobello caps. | joeshealthymeals.com

Nutty Oat Burgers on Portobello Caps

Course Main dish
Cuisine American
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 4 servings
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