1. Start by preparing the pistachio base. Preheat your oven to 350°F (175°C). In a food processor, pulse the pistachios with the flour, powdered sugar, and a pinch of salt until finely ground but not pasty.
2. Add the softened butter and pulse again until the mixture comes together in a crumbly dough. If you want a subtle green tint, add a few drops of green food coloring here and mix until combined.
3. Press the dough evenly into the bottoms of 6 small springform pans or tart rings (about 4 inches each). Bake for 12-15 minutes, until lightly golden at the edges. Remove from oven and let cool completely.
4. While the bases cool, prepare the raspberry puree. Combine the raspberries, 1/4 cup sugar, and lemon juice in a saucepan over medium heat. Cook, stirring occasionally, until the raspberries break down and the mixture thickens slightly, about 7-10 minutes.
5. Remove from heat and strain through a fine mesh sieve to remove seeds. Set aside to cool.
6. In a small bowl, sprinkle the gelatin over cold water and let it bloom for 5 minutes. Then, gently warm the gelatin mixture in the microwave or over a double boiler until fully melted—do not boil.
7. Stir the melted gelatin into the cooled raspberry puree, along with the vanilla extract. Mix thoroughly but gently.
8. In a large mixing bowl, whip the chilled heavy cream with the remaining 1/4 cup sugar until soft peaks form. Be careful not to overwhip; you want a light, airy texture.
9. Fold about one-third of the whipped cream into the raspberry mixture to lighten it, then gently fold in the remaining cream until fully incorporated and smooth.
10. Divide the raspberry mousse evenly over the cooled pistachio bases. Smooth the tops with a spatula and refrigerate for at least 4 hours, or overnight, to set.
11. Before serving, dust with powdered sugar and sprinkle with roughly chopped pistachios for extra texture.

One thing I’ve learned from years of hosting “Wednesday dinners” is that timing and prep can make all the difference. Making the mousse a day ahead not only saves stress but also lets the flavors meld beautifully. Plus, it gives you a little extra time to enjoy the moment when you finally sit down to eat.