Make the pound cake: Preheat the oven to 350˚. Butter the bottom and sides of a 9-by-5-inch loaf pan, then line with parchment paper in two overlapping strips, leaving an overhang. Butter the parchment and lightly dust with flour, tapping out the excess.
Combine the fresh raspberries, jam, 2 tablespoons cane sugar and 1/4 cup water in a medium saucepan over medium heat. Cook, stirring and smashing the berries with a wooden spoon, until thickened, 10 to 15 minutes. Remove from the heat and strain through a fine-mesh sieve into a medium bowl, pressing with a rubber spatula. Let cool.
Whisk the eggs, egg yolk, 1/4 cup heavy cream, 1 teaspoon vanilla and 3/4 teaspoon almond extract in a medium bowl until slightly foamy; set aside. Beat the butter and remaining 1 cup cane sugar in a large bowl with a mixer on medium speed until well combined, 1 to 2 minutes. Scrape down the bowl and increase the mixer speed to medium high. Beat until pale and fluffy, 6 to 7 more minutes. Reduce the mixer speed to low and beat in the flour until just combined. Gradually add the egg mixture and beat until combined. Scrape down the bowl, increase the speed to medium and beat until smooth and fluffy, 15 to 30 seconds.
Scoop 1 cup batter into the bowl with the raspberry sauce and stir in the red food coloring. Transfer half of the remaining plain batter to the prepared pan and top with half of the raspberry batter; swirl together with a knife. Repeat and swirl the batters together again. Bake until the top springs back when gently pressed and a toothpick inserted into the center comes out clean, 1 hour 10 minutes to 1 hour 20 minutes. Transfer to a rack and let cool 15 minutes in the pan. Lift the cake from the pan and remove the parchment; return to the rack to cool completely.
Make the glaze: Combine the confectioners' sugar, 2 tablespoons heavy cream and the remaining 1/8 teaspoon each vanilla and almond extracts in a medium bowl and whisk until smooth; thin with the remaining 1 tablespoon heavy cream, if needed. Spoon the glaze over the cooled cake and sprinkle with freeze-dried raspberries. Let set at least 20 minutes.
Quality ingredients make a big difference in pound cake. Try using premium butter — and if you can, use organic cane sugar. It gives the loaves a great crunchy top.