Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
6                       tostada shells (6 inches in diameter)
16        ounces        refried black beans
1 1/2     cups          cut-up cooked chicken or turkey
1         cup           salsa
1         medium        avocado
                        Lemon juice
3/4       cup           shredded Monterey Jack or Cheddar cheese
2         medium        tomatoes, diced 
3         cups          shredded lettuce, if desired

Preparation:

1. Heat tostada shells as directed on package. Heat beans in 1-quart saucepan over medium heat, stirring occasionally, until hot. Heat chicken and salsa in 2-quart saucepan over medium heat, stirring occasionally, until hot. 2. Peel avocado and cut lenthwise into slices; sprinkle with lemon juice. 3. Spread beans and chicken mixture over tostada shells. Sprinkle with cheese. Top with tomatoes, avocado and lettuce.