Bison Burger Patties with Grilled Portobello "Buns" - DineDishDigest

Ingredients

• 8 large portobello mushrooms
• 3 tablespoons olive oil
• 2 cloves garlic, minced
• 1 teaspoon fresh thyme
• Sea salt and black pepper to taste
• 1 pound ground bison meat
• 1 large egg
• 1 tablespoon fresh parsley, finely chopped
• 1 teaspoon onion powder
• 1 teaspoon sea salt
• ½ teaspoon black pepper
• 1 tablespoon olive oil
• Fresh lettuce leaves
• Sliced tomatoes
• Sliced red onion
• Avocado slices
• Paleo-friendly mustard
• Fresh herbs