2 pkg. strawberry Jello
2 or 1 3/4 c. boiling water
2 (10 oz.) pkg. frozen strawberries
1 (13 oz.) can crushed pineapple, drained
2 lg. fully ripe bananas, finely diced (optional)
1 c. sour cream
1/2 or whole pack Knox gelatin

Dissolve Jello in boiling water. Add berries, stirring occasionally until thawed. Add pineapple and bananas. Pour half the mixture into an 8 x 8 x 2 inch pan. Chill until firm. Spoon sour cream over chilled Jello, spreading in an even layer. Pour remaining Jello mixture over sour cream.