Preheat the oven to 350 degrees F. Grease two 8-by-4-inch loaf pans with vegetable oil.
In a large bowl, beat the sugar and eggs using an electric mixer on medium speed, until creamed and pale, about 2 minutes. Add the zucchini, oil and vanilla and beat for another 2 minutes. Combine the flour, baking powder, baking soda and salt in another bowl. Stir the dry mixture into the egg mixture. Fold in the crushed pineapple and walnuts. Divide the mixture equally between the two greased loaf pans. Bake until a toothpick inserted near the center comes out clean, about 1 hour. Cool in the pan for at least 15 minutes. Remove the loaves and place on wire racks to cool completely. Serve warm or at room temperature with butter or your favorite jelly.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.