Menu
Stripes of carrots and orange bell peppers cooked in herb scented butter
Shrimps braised in olive oil with garlic and hot pepper flakes
Cantaloupe halves filled with bits of orange
Grapefruit/grenadine juice

My first test eaters were excited about the idea and immediately bubbled over with ideas for more colours and ingredients. We laughed a lot because  in German a “medium done” steak is “pink fried”, or Schwarzwurzeln (salsifies) are white but their name actually is “black roots”…  
The most challenging colours seemed to be brown (a must nevertheless, because of the beloved chocolate desserts) and black (pure extravaganza!)