Nana's Cheesecake recipe

1 lb ricotta cheese - room temp

1 lb sour cream - room temp

1lb cream cheese - room temp

1 1/2 cup sugar

1 stick butter

3 large eggs - one at a time

3 Tbsp cornstarch

3 Tbsp flour

1 Tbsp lemon juice

2 Tbsp vanilla

grease and flour spring form pan

300 degrees bottom oven rack ~1 hour or until done

cool in the oven