How to Make It
Preheat oven to 350°.
To prepare cake, place first 5 ingredients (through eggs) in a large bowl; beat with a mixer at medium speed 30 seconds or until well combined. Weigh or lightly spoon flour into dry measuring cups; level with a knife. Combine flour and next 5 ingredients (through ginger) in a medium bowl, stirring well with a whisk. Add flour mixture to sugar mixture; beat at low speed just until combined. Stir in apple by hand. Spread batter into a 9-inch springform pan coated with baking spray.
To prepare streusel, combine oats and next 4 ingredients (through dash of salt) in a small bowl; toss to combine. Sprinkle streusel topping evenly over batter.
Bake at 350° for 45 minutes or until a wooden pick inserted in center comes out with moist crumbs clinging. Cool in pan 10 minutes on a wire rack; remove sides of pan.
To prepare cream, place yogurt, whipping cream, and 1 tablespoon sugar in a bowl; beat with a mixer at medium speed until soft peaks form. Serve with warm cake.