Preheat oven to 350°F. Line an 8-inch springform pan with parchment paper in the bottom.
Mix graham crumbs, sugar, melted butter, and salt until you get a wet sand consistency.
Press the crust mixture into the bottom of the prepared pan. Bake it for 8 minutes. Cool slightly.
To make the cheesecake filling, beat cream cheese until smooth using a stand mixer. Add sugar, sour cream, lemon juice, lemon zest, vanilla, and flour. Mix until just combined.
Add the eggs one at a time, mixing on low and stopping when just incorporated.
Pour half the batter into the crust. Spoon ¼ cup of raspberry coulis (see link in notes below) over the batter and swirl lightly with a knife. Add the remaining batter and repeat with more coulis on top.
Bake it for 55 to 65 minutes, or until the edges are set but center is slightly wobbly.
Turn the oven off, crack the door, and let it sit inside for 1 hour.
Chill in the fridge at least 4 to 6 hours (overnight is best).