Grilled Portobello Sloppy Joe’s

Sloppy Joe’s are an easy and quick dish to prepare. Top on a grilled portobello mushroom, or in your favorite gluten free bun.


Grilled Portobello Sloppy Joe's
Prep time:
Cook time:
Total time:
Serves: 4
Top on a grilled portobello mushroom, or in your favorite gluten free bun.
  • 8 portobello mushroom caps
  • 4 Tbsp olive oil, divided
  • 1 red onion, finely chopped
  • ¼ cup green pepper, finely diced
  • ¼ cup celery, finely chopped
  • 3 cloves garlic, minced
  • ½-1 tsp chili powder
  • 1 lb ground beef*
  • 1 can (14 oz) diced tomatoes, with juice
  • 3 Tbsp GF tomato paste
  • 1 Tbsp GF Worcestershire sauce
  • 2 tsp GF liquid beef bouillon, optional
  • ½ tsp salt
  • ¼ tsp pepper
  1. Remove stem and gills from mushrooms, using a spoon to gently scrape the out. Drizzle with olive oil and season with salt and pepper, set aside.
  2. Sauté the onion, garlic, green pepper, celery, and chili powder in 2 Tbsp of oil until onion is softened. Remove and set aside.
  3. Fry the ground beef until fully cooked, drain any fat. Add in remaining ingredients, and simmer until mixture has thickened, about 15 minutes. Season to taste with salt and pepper.
  4. While meat mixture is cooking, prepare the mushroom caps. Grill them on each side using; the stovetop (as pictured), in the oven under the broiler, or you can use a panini press. Grill mushrooms until they are slightly softened, then set aside.
  5. To serve, on top of each mushroom (gill-side up) add ¾ cup of Sloppy Jop mixture.
-To make this vegetarian, replace meat with 1-2 cups of cooked red quinoa.
-If can't find GF liquid bouillon, use powdered version mixed with a bit of water.


[hr]FAQ: Is Vinegar Safe?



  1. Thank you for all the time spent on sharing these recipes. I am new at eating Gluten Free and you surely have been a blessing.

  2. I would like to make this but allergic to mushrooms and tomatoes…. I go by my gluten free diet and “4 Your blood type diet book” it really is true because I have always been allergic to citrus. melons and coffee….. and lots of other food….

    keep up the good work…. I do make many recipes that I find leaving out food I can’t eat…Flo

  3. In this dish you can use a gluten free bun, or even put over gluten free pasta if you like. In other recipes, lentils or beans would be a good option. Tofu is another idea as well since like mushrooms its soft, has no real taste of its own so it absorbs the flavors of what its cook with.

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