California Avocado Steakhouse Burger

INGREDIENTS

• 1/4 cup finely diced white onion
• 1/8 cup finely diced bell pepper
• 3/8 cup cut in half and thinly sliced white mushrooms
• 2 teaspoons steak sauce
• 1 pound lean ground beef
• 4 whole wheat buns
• 8 leaves lettuce
• 4 slices large beefsteak tomato
• 1 ripe Fresh California Avocado, peeled, seeded, and sliced
• 1 batch Steakhouse Lite Ranch Sauce (optional, recipe below):
• 4 tablespoons light ranch dressing
• 2 tablespoons steak sauce