1. Preheat oven to 350°.
2. Weigh or lightly spoon flour into dry measuring cups; level with a knife. Combine flour, baking powder, and salt, stirring well with a whisk. Place granulated sugar and next 3 ingredients (through almond paste) in a large bowl; beat with a mixer at medium speed until well combined (about 3 minutes). Add eggs, 1 at a time, beating well after each addition; beat in vanilla. Beating at low speed, add flour mixture and 1/2 cup milk alternately to butter mixture, beginning and ending with flour mixture; beat just until combined.
3. Scrape batter into a 9 x 5-inch metal loaf pan coated with baking spray; sprinkle with sliced almonds. Bake at 350° for 50 minutes or until a wooden pick inserted in the center comes out with moist crumbs clinging. Cool in pan on a wire rack 10 minutes. Remove from pan; cool on wire rack.
4. Place powdered sugar in a small bowl. Add remaining 1 tablespoon milk and dash of salt; stir with a whisk until smooth. Drizzle glaze over top of bread; let stand until set.