In a large bowl, combine the popcorn and chex cereal. Set aside.

In a small, microwave-safe bowl combine the white chocolate chips and shortening. Microwave on high for 30 seconds. Stir and heat an additional 15 seconds, if needed, and stir until smooth. Stir in green food coloring - enough to make the chocolate dark green.

Pour the chocolate over the popcorn and chex and gently stir or toss to coat. Set aside (or in the fridge) and allow the chocolate to set for 10-15 minutes.

Once set, add the M&M's, peanuts, and pretzels and stir or toss to mix well. Then you're ready to serve (i.e. EAT IT ALL!)