Line a large sheet pan with parchment or wax paper. Have nearby a can of cooking spray.
Rice Krispies Treats: Melt butter in a large deep heavy bottomed saucepan on the stove over medium heat. Once melted add the marshmallows. Cook stirring to prevent sticking until the marshmallows have completely melted.
Remove the pot from heat, and add vanilla. Mix well. Next, add rice krispies stirring quickly to fully coat.
Use a regular sized 4 ounce ice cream scoop to divide the cereal mixture. Spritz the scoop and your hands with cooking spray. Roll the cereal mixture into balls. Place on pan. Repeat until all has been used.
Use a shot glass or pastry tamper to press and flatten the center of each ball. Let cool completely.
Make Frosting: In a mixing bowl, mix together frosting and lemon curd. Add green food coloring until desired color is reached. (If you're omitting lemon curd, the frosting can be colored and mixed in the can)
Decorate: Use a piping bag or the corner of a plastic storage bag with the tip cut off to pipe the frosting into the centers for grass.
Arrange eggs over "grass" then sprinkle with edible glitter.
Store in an airtight container chilled in the refrigerator for up to 1 week. Bring to room temperature for serving.