Portobello Burgers With Blue Cheese And Sautéed Red Onions

Ingredients

• FOR THE PORTOBELLO BURGERS
• 8 large portobello mushroom caps
• 4 cloves garlic, minced
• 3 tbsp. steak sauce, like A1
• ¾ cup breadcrumbs
• 1 egg
• ½ tsp. fresh-ground black pepper
• FOR THE ONIONS
• 3 tbsp. butter
• 1 large red onion, thinly sliced
• 2 tbsp. balsamic vinegar
• 2 tsp. dried thyme
• Salt and pepper, to taste
• 2 tbsp. olive oil
• 4 oz. blue cheese, crumbled
• 4 sesame seeded hamburger buns, split and toasted

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