Crush the graham crackers using a rolling pin or a food processor, and combine with 1/4 tsp sugar and 1 tbs melted butter. The mixture should have a sandy texture. Press the mixture into the bottom of a ramekin and bake for 15 minutes at 350˚F. After 15 minutes, remove the dish from the oven and turn up the oven to 400˚F.
For the filling, mix the white sugar, cornstarch, and water in a small saucepan over low heat. Stir and keep an eye on the mixture until it thickens. Remove from the heat and mix in O California Meyer Lemon Olive Oil, butter, and lemon juice. Stir until well-combined and the butter is melted. Set aside.
In a new bowl, add 1 egg white. Beat with a mixer until slightly foamy, and then gradually beat in the cream of tartar and sugar. Continue to beat on a high setting until it doubles in size and becomes white and fluffy. When you remove the beaters, stiff peaks should form.
Layer the lemon filling and then the meringue on top of the graham crackers. Make sure to spread the meringue to the edges of the dish and you can use the back of a spoon to form peaks. Bake for 8-10 minutes at 400˚ until the top starts to turn golden brown.