Mushroom Veggie Burgers

I found this on RecipeGirl.com. She says these are so meaty and juicy, you'd swear they were made with beef. I haven't tried this yet but will when I buy more portobello's.

• Ready In: 30 mins
• Serves: 4
• Yields: 4 burgers

Ingredients

• 1  tablespoon olive oil
• 1 1⁄2 cups  moderately finely chopped onions (about 1 large onion)
• 3  small garlic cloves, finely minced
• 4  cups  coarsely chopped portabella mushrooms (about 2 large mushrooms)
• 1⁄4 teaspoon salt
• 1⁄8 teaspoon fresh ground black pepper
• 1  cup  Italian seasoned breadcrumbs
• 2  large  egg whites
•  bun, and condiments of your choice

Directions

1. Heat olive oil in 12" skillet over moderately high heat for 1 minute. Add chopped onion and garlic and saute, stirring occasionally, until limp and golden- about 3 minutes.
2. Add mushrooms and saute, stirring now and then, until mushrooms soften and brown- about 4 minutes. Transfer mushroom mixture to a large bowl and cool 10 minutes.
3. Using wooden spoon, mix salt, pepper and bread crumbs into mushroom mixture. Add egg whites and mix thoroughly.
4. Scoop up mixture by 1/2-cup measure, then using hands, shape into 4 patties about 3/4" thick.
5. Wipe out skillet, spray with nonstick spray, and set over moderate heat. Add patties and brown about 3 minutes on each side.
6. Serve on buns and add desired condiments.