Pebble Creek Mushrooms are only available in restaurants, so please visit our Spore Store so you can grow your own gourmet culinary mushrooms.

Roasted Mushrooms with Onion, Garlic, and Rosemary Recipe


  • 15 ounces King Oyster mushrooms, sliced
  • 5 to 8 cloves garlic, grated
  • 1/2 red onion
  • 2 sprigs rosemary, divided
  • 1/4 cup extra virgin olive oil
  • 1 teaspoon red wine vinegar


  • Preheat oven to 375 degrees F. Line a cookie sheet with foil, and place mushrooms on it. Set aside.
  • In blender, combine grated garlic, onion, 1 sprig rosemary (remove stem), red wine vinegar and olive oil. Blend until mixed, but not smooth. You should be able to see pieces of onion in the mixture.
  • Spread mixture over the sliced (1/4 inch) mushrooms and use your hands to evenly coat. Sprinkle salt and pepper; place the other rosemary sprig across mushrooms. Fold foil over mushrooms to create an envelope and poke a few holes in the top to allow steam to escape.
  • Bake for 35 to 40 minutes. Remove rosemary sprig before serving.
  • This dish would be great as a side to rice or placed in pasta or served as an appetizer. This dish has lots of flavor. If you don’t like sharp tastes, lessen amount of garlic and/or onion. You can use whatever mushrooms you like; simply adjust baking time on size of mushrooms.