Dissolve gelatin in boiling water.
Stir in cold water, lemon juice, mayonnaise, and salt.
Turn into freezing tray.
Freeze 15 to 20 minutes, or till firm about 1 inch from edge but still soft in center.
Turn into bowl and whip with rotary beater until fluffy.
Fold in green pepper, fruit.
Pour into 1-quart mold; chill till firm (30 to 60 minutes)