Combine refried beans with taco seasoning mix in small bowl. Spread onto bottom of 2-qt. glass baking dish; set aside.
Process avocados, 2 Tbsp. Hellmann's® or Best Foods® Real Mayonnaise, red chile pepper and lemon juice in blender or food processor until smooth. Spread over bean layer. Sprinkle with red onion, then add tomatoes; set aside.
Combine sour cream with remaining 2 Tbsp. Hellmann's® or Best Foods® Real Mayonnaise, then spread over tomatoes. Top with cheese, then olives, then lettuce and green onions. Garnish, if desired, with sliced jalapeño pepper and/or sliced green bell pepper. Serve, if desired, with tortilla chips or your favorite dippers.