Tomato and Spinach Swirly Two-Toned Sandwich Bread
Place two bowls side-by-side, and first make a sponge, then the dough (for more explanation on this--with pics and recipes--click the above links).
After the doughs have risen once or twice cut them into appropriate sizes and weights to fit your pans, then cut each in half again. Lay one piece of each separate dough on top of each other and roll them up.
Place the dough into bread pans (or bake them free-form if you like) and allow them to rise; afterwords. bake them in a preheated oven. Simple and interesting...not to mention delicious.