RECIPE FAVE: Portobello Mushroom Burger with Avocado Dressing

• 2 medium portabella mushrooms, stems removed
• 1 medium onion, cut into 1/2 inch slices
• 2-3 tbsp olive oil
• 1/2 avocado
• 3 Tbsp low-fat yogurt
• 1/2 tsp minced garlic
• 1 Tbsp Worcestershire sauce 
• 2 hamburger buns or sandwich thins, lightly toasted
• 1 roasted red pepper, large (from a jar)
• 2 Tbsp. feta cheese
• salt and pepper to taste

Heat large skillet over medium heat until hot. Add olive oil.  cook onion slices until golden, about 8 minutes, turning occasionally.  Put onions to the side.

Add mushrooms to skillet.  Add salt, pepper and Worcestshire sauce.  Cook until tender, 8 to 10 minutes, turning once. Add roasted red peppers.  Transfer mushrooms and peppers to plate.  

Meanwhile, combine 1/2 of the avocado, yogurt, garlic and salt and pepper in food processor.  Process until smooth.

Spoon onions and roasted peppers Spread smooth Avocado mixture on bottom of each bun; top each with stuffed mushrooms, onions and roasted peppers.  Sprinkle feta on burger. 

Adapted from About.com: Vegetarian Foods
.