To make this lemon souffle "souffle" over the rim of the dish, use a 1-quart souffle dish and make a foil collar for it as follows: Cut a piece of foil 3 inches longer than the circumference of the souffle dish and fold it lengthwise into fourths. Wrap the foil strip around the upper half of the souffle dish and secure the overlap with tape. Tape the collar to the souffle dish as necessary to keep it from slipping. Spray the inside of the foil collar with vegetable cooking spray. When ready to serve, carefully remove the collar. For those less concerned with appearance, this dessert can be served from any 1 1/2-quart serving bowl. For best texture, serve the souffle after 1 1/2 hours of chilling. It can be chilled up to 6 hours; though the texture will stiffen slightly because of the gelatin, it will taste just as good. Cooking time is chill time.