I pulse the graham crackers, brown sugar, cinnamon, and salt in the food processor until they turn into fine crumbs. Then I drizzle in the melted butter and pulse again until the mixture looks like damp sand. I set this aside in a bowl and wipe out the processor bowl before moving on, since I need it clean for the cheesecake filling next.
I whisk the gelatin into the warm water in a small bowl and let it sit for about five minutes until it turns thick and spongy. This step matters more than people think, because unbloomed gelatin leaves lumps in your filling. I never skip it, even when I'm in a rush to finish the rest of the recipe.
I pulse the softened cream cheese in the food processor until it's completely smooth, scraping down the sides as I go. Then I add the sugar, vanilla, salt, lemon juice, and the bloomed gelatin, pulsing again until combined. With the processor still running, I stream in the heavy cream and a few drops of food coloring until the batter turns a soft, pale pink.
I combine the strawberries, sugar, lemon juice, and water in a saucepan over medium-high heat, bringing it to a simmer until the berries soften but still hold their shape. I strain the syrup into a separate bowl, then return just the liquid to the pan and keep cooking until it thickens, about ten minutes. I chill both the berries and the syrup separately until I'm ready to serve.
I coat my brain mold generously with cooking spray, then pour in half of the cheesecake batter, swirling it around to coat the sides. I freeze this for about five minutes so it firms up slightly, then use the back of a spoon to push the batter up the walls of the mold, leaving a hollow center for the crust layer.
I press the crumb mixture into the hollow center of the mold, then pour in the rest of the cheesecake batter to cover it completely. I smooth the top with my spatula so the base sits flat once I flip the mold over later, since that flat side becomes the bottom of the finished brain.
I cover the mold and freeze the whole thing for at least four hours, though I usually leave mine overnight when I have the time. This long freeze is what lets the cheesecake hold its brain shape once it's out of the mold, so I don't rush this part no matter how tempting it is to peek early.
When I'm ready to serve, I dip the mold briefly in warm water and gently pull it away from the cheesecake. I let the brain sit in the fridge for about twenty minutes to soften slightly, then I drizzle the chilled strawberry syrup over the top so it pools and drips down the grooves like blood.