To create deviled egg Christmas trees, start by hard-boiling a few eggs.Next, cut the peeled boiled eggs half crosswise "to make it look like a planter for the Christmas Tree," Whalen says. Then ...

Cut eggs in half and remove yolks. Puree yolks, avocado, mayonnaise, mustard, horseradish, in a food processor until smooth, 2 to 3 minutes. Add food coloring and pulse to combine.