Jan 5, If you've ever wanted to taste the "cheesy" rainbow, then you should try this rainbow grilled cheese recipe the next time you make a GC. Rainbow Grilled Cheese Recipe. Delight your little ones with these magically delicious, multicolored sandwiches. Artesano™ Bakery Bread Featuring: Artesano. Apr 21, When we saw this rainbow grilled cheese from Kala Toast, we all Disney Has a Unicorn Cupcake With Its Own Mickey Ears, So Yep, We'll. UNICORN RAINBOW GRILLED CHEESE SANDWICH!!