Wash hands with soap and water.
Prepare crust by mixing all the crust ingredients until they are moldable like wet sand.
Press crust mixture firmly into a pie tin and bake at 350 °F for 7 minutes. Set aside.
Scrub key limes with a clean vegetable brush under running water. Squeeze to make ½ cup of key lime juice.
Add all of the pie filling ingredients to the blender. Blend until smooth.
Add agar powder to a small saucepan. Activate the agar powder by adding ⅓ cup of water. Cook over medium-high heat while whisking constantly until it becomes clear and thick.
Scrape agar mixture into the blender. Blend everything together until smooth.
Pour pie filling into the crust and chill until firm, at least 3 hours.
Decorate pie to your liking, using key lime slices, almond miIk-based whipped cream and edible flowers (as pictured).