I just added the Big Rainbow Heirloom Tomato to my garden today. flesh inside is marbled with red in the bottom half of the fruit. It has a big, lumpy beefsteak shape with a very mild and sweet flavor. And I really want to try the Italian Ice Tomato from Burpee. The blurb on the Burpee site reads: "Sugary sweet and bursting with juicy flavor, ‘Italian Ice’ is a summer picnic treat. Clusters of 1-1 1/2" snack-sized fruits ripen from green to ivory white, becoming uniquely sweet and mild tasting."