The soufflés can be assembled up to four hours ahead; chill until ready to bake.
Ingredients
6 teaspoons seedless boysenberry jam
24 frozen boysenberries or blackberries
2 tablespoons finely grated lemon peel
3/4 cup sugar, divided
1 tablespoon cornstarch
3/4 cup whole milk
3 large eggs, separated
2 tablespoons (1/4 stick) butter
5 tablespoons fresh lemon juice
Powdered sugar
Directions
Preheat oven to 400°F. Butter six 3/4-cup ramekins; coat with sugar. Spoon 1 teaspoon jam and 4 frozen berries into bottom of each ramekin. Place on baking sheet. Mash lemon peel and 1/2 cup sugar in heavy medium saucepan; whisk in cornstarch, then milk and yolks. Add 2 tablespoons butter. Bring to boil over medium heat, whisking constantly. Boil until thick pudding forms, whisking constantly, about 1 minute. Transfer to large bowl; mix in lemon juice. Season to taste with salt.
Using electric mixer, beat egg whites in medium bowl to soft peaks. Gradually beat in 1/4 cup sugar; beat until stiff but not dry. Fold whites into warm lemon pudding. Spoon mixture atop berries; fill to top. Bake until puffed, set, and golden around edges, about 14 minutes. Sift powdered sugar over.
