In a small saucepan, combine the Meyer lemon juice, sugar, eggs, and Meyer lemon zest over medium-low heat.
Whisk until smooth and continue to whisk until thickened, about 8 minutes. Remove from heat.
Mix in butter until smooth and melted. If desired, strain the mixture through a fine mesh sieve and into a medium bowl. Cover and refrigerate until well chilled, at least 2 hours.
To make the Vanilla Yogurt:
In a medium bowl, whisk together the Greek yogurt with honey to taste and vanilla extract. Cover and refrigerate until ready to assemble the Meyer Lemon Parfaits.
To assemble:
To the bottom of three to four small serving glasses, add about a tablespoon of the vanilla yogurt. Top with a layer of the chilled Meyer lemon curd. Cover with a layer of the crushed graham crackers. Add more yogurt and top with a final layer of Meyer lemon curd.
Garnish with a large pinch of crushed graham crackers, fresh mint, and if desired, a pinch of sea salt and more lemon zest.