From
Baking with Julia by Dorie Greenspan
The Topping
1/2 stick (2 ounces) unsalted butter
1 cup (packed) dark brown sugar
3 to 4 ripe medium nectarines (the number will depend on the size), each cut into 8 pieces*
Center a rack in the oven and preheat the oven to 350 degrees Fahrenheit.
Cut the butter into 3 or 4 chunks and toss them into a 10-inch springform pan that's 3 inches high. Place the pan directly over a medium-low heat and melt the butter, tilting the pan so that the butter covers the bottom evenly. Remove the pan from the heat and scatter the brown sugar evenly over the butter, patting it down with your fingertips. Arrange the nectarine pieces in concentric circles over the sugar. For a fancier effect, alternate the ways the nectarines face from circle to circle. Wrap the bottom of the pan in aluminum foil to catch any butter that might drip during baking and set aside.**
The Streusel
1/4 cup unblanched whole almonds
1/2 cup all-purpose flour
1/4 cup (packed) dark brown sugar
1 teaspoon cinnamon
1 teaspoon ginger
1/2 stick (2 ounces) cold unsalted butter, cut into small pieces
1/2 cup quick-cooking (not instant) oats
Put the almonds on an ungreased jelly-roll pan and bake them until golden brown and fragrant, 10 to 15 minutes, stirring frequently so that they toast evenly.*** To test for toastiness, break one open--it should be light brown in the center. Cool the almonds before proceeding.
Line the jelly-roll pan with parchment paper and keep at the ready.
Put all of the streusel ingredients, including the almonds, into the work bowl of a food processor fitted with the metal blade and pulse just to mix the ingredients and chop the almonds and butter. The mixture will be rough and crumbly. Spread the streusel out on the pan and, if you'd like to have a few largish lumps for textural interest, squeeze some of the streusel lightly between your hands and then break the big clumps into smaller bits.
Bake the streusel for 10 to 15 minutes, stirring once or twice, until golden brown. Transfer the pan to a rack and cool while you make the cake. (Keep the oven at 350 degrees)
The Cake
1 1/2 cups sugar
1 cup all-purpose flour
1 teaspoon baking powder
1 teaspoon baking soda
1/2 teaspoon salt, preferably kosher
4 large eggs, separated
1/2 cup vegetable or safflower oil
1/2 cup fresh lemon juice
2 large egg whites
Ice cream or lightly sweetened whipped cream, for serving (optional)
Sift together 1 cup of the sugar, the flour, baking powder and baking soda onto a sheet of parchment or waxed paper; add the salt.
In a large bowl, whisk together the egg yolks, oil and lemon juice until blended. Gradually add the dry ingredients to the yolk mixture, whisking all the while; set aside.
Beat the 6 egg whites in the bowl of a mixer fitted with the whisk attachment, or work with a hand-held mixer. at low speed, beat the whites until they're foamy and form soft peaks. Increase the speed on the mixer to medium-high and gradually add the remaining 1/2 cup of sugar, beating until the whites are thick and shiny and hold peaks. (If you run a finger through the whites, it should leave a smooth, even path.) Fold about one third of the whipped egg whites into the yolk mixture to lighten it, then turn the yolk mixture into the whites and fold it in gently but thoroughly.
Pour and scrape half of the batter into the fruit-lined pan. Smooth the top using an offset spatula, and sprinkle over the streusel, keeping a little in reserve for decorating the finished cake. Top with the remainder of the batter, smoothing it with the spatula, and place the pan on a jelly-roll pan. Bake in the 350 degree oven for 45 to 50 minutes, or until golden brown and a toothpick**** inserted in the center comes out clean. Remove the cake to a cooking rack and let it cool for at least 25 minutes before inverting it onto a cardboard cake round or a serving platter.
Serve the cake with ice cream or lightly sweetened whipped cream if desired and a dusting of the remaining streusel.
This cake is best served just warm or at room temperature the day it is made. However, you can cover the cake and keep it at room temperature overnight.
*I cut the peaches into 12 pieces. 8 seemed kinda massive.
**See! Stupid springform pans. You do not have to worry about dripping butter with a normal cake pan.
***I never toast nuts in the oven anymore, too much hassle. I put them in a brown paper bag and microwave them in 30 second intervals, shaking the bag between nukes.
****At a bakery I worked at, they used bamboo skewers (you know, for tasty shish kebabs), instead of toothpicks, and boy-howdy do I love them for that now.