Red Velvet Cake:

1. Preheat the oven to 350°F (175°C).
2. Mix butter and sugar until light.
3. Add eggs, cocoa, and vanilla, then blend in buttermilk and food coloring.
4. Pour into a springform pan and bake for 20-25 minutes. Let cool.

Cheesecake Layer:

1. In another bowl, beat cream cheese, sugar, eggs, and vanilla until smooth.
2. Pour over the cooled red velvet cake and bake at 325°F (160°C) for 45-50 minutes.
3. Let cool, then chill in the fridge for 2 hours.

Assemble:

1. Top the cheesecake with fresh strawberries and drizzle with strawberry sauce. Slice and serve chilled.