What you'll need:
cake + frosting of your choice (I used yellow cake + buttercream frosting)
Fondant: (Can be purchased online or at your local walmart)
green icing Gel (can be purchased at your local walmart or online. I got mine gifted from my amazing mom from italy !!)
Per usual, the first step is always to bake the cake and make the frosting per your recipe's directions. Leave the cake on the side to cool completely! While this is happening you can get your fondant ready and rolled out. Start with the pink, since this will be covering the biggest portion. Roll out your fondant to be less than 1/2 cm thick, and leave on the side.
When cake is cooled, cut out a triangle, as to mimic a "watermelon slice," and ice completely. See pictures for details.
Grab your green fondant, and roll out to less than 1/2 cm thick. Cut a straight edge on one side, which we will be using to cover the remaining top portion of your "watermelon bite." I overlapped the white fondant a little to create a more realistic look. See picture for details.
Trim excess edges
Last step is about the details, you all know I'm all about the small details, like I said...the small details will set you apart! Grab your green icing gel and a brush of your choice and paint on green lines. Make sure they aren't perfect lines, as real watermelons don't have perfect straight green variation on the rind.