- Make the lemon curd: In a heavy-bottomed saucepan fitted with candy thermometer over low heat, lightly whisk egg yolks. Add sugar and butter, then lemon juice. Stir with a rubber spatula until mixture reaches 170 degrees, about 5 to 10 minutes. The mixture should thicken slightly but still fall off the back of a spoon. Stir in zest and taste, adjusting with more juice or zest as necessary. Remove from heat and cool. Store in fridge in a tightly covered jar.
- Make the dough: Before measuring, whisk flour in its container to lighten. Take a large spoon and scoop flour into a dry 1-cup measuring cup. When full, level off any excess flour with the back of a knife. Add to the bowl of a food processor. Set aside remaining ½ cup flour for rolling out dough.
- Add butter cubes to processor and pulse until the size of oatmeal. Add cream cheese pieces and pulse quickly until it becomes a lumpy dough. Scrape out dough between two pieces of plastic wrap. Press dough into smooth, flat disc about 8 inches in diameter, wrap in plastic, and refrigerate for at least 30 minutes or up to 5 days.
- Assemble the tart: Preheat oven to 350 degrees. Roll out pastry to ⅛-inch-thick between pieces of plastic wrap. If sticky, sprinkle the surface with a bit of flour. Remove the top sheet of plastic wrap and flip dough into a 9-inch tart pan with removable bottom, trimming any excess. Fit dough into recesses of pan by lifting gently and lightly pressing dough along the bottom and sides of pan. Remove second sheet of plastic wrap. Crimp edges and prick the bottom and sides of dough lightly with a fork. Line dough with a sheet of parchment paper or aluminum foil and fill with raw rice, beans, or pie weights. Bake until crust is fully cooked, about 25 minutes, covering edges as necessary to keep from burning. Remove pie weights and liner, and cool on a rack.
- Remove outer ring of tart pan. Fill crust with lemon curd, smoothing top with an offset spatula or knife. Arrange berries on top of curd. Chill before serving.