1-First Step: Mise en place Measure all ingredients precisely. Zest and juice lemons first (1 tsp zest, 1/3 cup juice). Separate 4 eggs carefully, reserving whites for later. Cube 1/2 cup butter for crust and set aside 2 tbsp. Boil 1 1/2 cups water. This setup prevents rushed mistakes, ensuring smooth flow. Pro tip: Chill bowl for meringue in freezer.

2-Second Step: Prepare and pre-bake the crust Mix 1 1/4 cups flour and pinch salt in bowl. Cut in 1/2 cup cold butter until pea-sized crumbs form. Sprinkle 3-4 tbsp ice water, stir until dough holds. Roll into 9-inch circle on floured surface, fit into pie plate. Crimp edges. Bake at 425°F for 10 minutes until light golden. Cool slightly. Store-bought? Just pre-bake 8 minutes. This crisp base prevents sogginess.

3-Third Step: Cook the lemon pie filling In saucepan, whisk 4 egg yolks, 1 cup sugar, 2 tbsp cornstarch, 1/4 tsp salt. Gradually add boiling water while whisking. Cook over medium heat, stirring constantly for 10 minutes until thickened like pudding. Remove from heat, stir in 2 tbsp butter and 1 tsp zest. Pour into warm crust immediately. Bubbles may form; smooth top. This creates the signature creamy lemon pie filling, thick and glossy.

4-Fourth Step: Make and apply meringue Beat 4 egg whites and 1/4 tsp cream of tartar to soft peaks on medium-high (about 2 minutes). Gradually add 1/2 cup sugar, beat to stiff glossy peaks (3-4 minutes). Spread over hot filling, sealing to crust edges to prevent shrinkage. Use spoon for peaks. Bake at 350°F for 15 minutes until golden. Watch closely to avoid burning.

5-Final Step: Cool and serve Cool at room temp 3-4 hours, then chill 2 hours for clean slices. Slice with sharp knife dipped in hot water. Garnish with extra zest or berries. Serves 8 perfectly. For lemon icebox pie, skip meringue and chill filling 4 hours.