How to Make It
Bring water to a boil in a Dutch oven over high. Add pasta shells and salt to boiling water. Cook, stirring often, until al dente, about 10 minutes. Drain and rinse with cold water.
Divide pasta among 3 ziplock plastic bags. Add 2 drops of pink coloring to 1 bag, 2 drops of purple coloring to second bag, and 2 drops of turquoise coloring to third bag. Add 1 tablespoon melted butter to each bag. Seal bags, and toss to coat pasta in color.
Combine all pasta in a serving bowl, and toss with Parmesan cheese as “sand”. Garnish with basil as “seaweed”.