Goat Cheese-Lemon Cheesecake

3 lemons 

4 eggs, at room temperature 

1 cup sugar  

Pinch of salt 

4 Tbs. (1/2 stick) unsalted butter  

2 Tbs. heavy cream 

6 oz. almond biscotti, broken into pieces 

2 Tbs. plus 1 cup sugar 

4 Tbs. (1/2 stick) unsalted butter, melted 

Pinch plus 1/4 tsp. salt

4 eggs, at room temperature 

1/2 tsp. vanilla extract 

1/2 tsp. lemon oil 

1 lb. Neufchâtel cheese, at room temperature 

1/2 lb. fresh goat cheese, at room temperature 

1 cup sour cream