SIMPLE and Awesome idea! Instead of using grout, just use thin strips of tile. You can stick these thin strips in between tiles just like you would when you lay the tile. Just cut the strips whatever size you need to go between. You can use different colors or patterns to give your floor a really unique look.
Macaroni Grill’s Penne Rustica (copycat)...bacon, shrimp, and chicken in this baby!!! absolute heaven :)