My mother used to dye our milk green. It's not really my number one green recommendations. Here are a few I like a little better.
1. Grasshopper Cake. It's not traditional, but it's green and tastes amazing.
2. Chocolate Mint Brownies. Clearly I care not at all about tradition unless tradition is rich chocolaty mint.
3. Green Drink. Of course there's this for people who aren't going for colcannon, but would like to not weigh 10 extra pounds after St. Patty's Day. There's also this one with avocado or this one with kale and avocado.