|Wait! That's not a shamrock!|
But what if you don't like corned beef?
Instead of traditional food, why not just serve the traditional color? I'm not talking about a bowl of lettuce, but how about a bowl of pasta? Instead of the traditional red sauce, serve your pasta with pesto instead.
Pesto is traditionally made with basil and pine nuts, but lately pesto had evolved into all sorts of variations, including arugula pesto and spinach pesto and pesto with almonds or pistachios instead of pine nuts. The thing about pesto is that it's easy to make, and once you know the basics you can adapt and modify and change things to your heart's desire.