Sift together the flour, baking powder, and salt and set aside.
Using a mixer, cream butter and sugar until light and fluffy, about 5 minutes on medium to medium-high speed.
Scrape down the bowl. Slowly add in the whisked eggs and vanilla, mixing very well after each addition. Do not do this too quickly or the mixture will curdle.
Add half of the dry ingredients and mix on low speed until almost combined. Add buttermilk and mix until combined, add remainder of the dry ingredients, mixing until just combined. The batter will be quite thick.
Using an offset spatula, spread the batter evenly into the prepared baking pan, then spread the strawberries evenly over the top. Break up the crumbs and sprinkle for an even layer over the strawberries.
Bake for 55-60 minutes, or until a toothpick inserted into the center comes out clean. The berry layer may make it difficult to test leaving residual moisture on tester, try not to overbake.
Cool cake for 20 minutes on a wire cooling rack, then remove from the pan and cool completely. Dust with powdered sugar before serving.