Step 1

Preheat oven to 325 degrees F. Line 24 (1/2-cup) muffin cups with paper liners or coat with cooking spray.

Step 2

Combine graham cracker crumbs and oil in a small bowl. Press about 2 teaspoons in the bottom of each muffin cup.

Step 3

Beat ricotta in a large mixing bowl with an electric mixer until smooth. Add cream cheese, eggs, sugar, lemon zest and juice, vanilla and salt; beat until smooth. Fold in 1 cup blueberries. Spoon about 1/4 cup cheesecake batter into each muffin cup. Sprinkle each cheesecake with some of the remaining blueberries.

Step 4

Bake the cheesecakes until almost set in the center, 32 to 35 minutes. Let cool in the tin on a wire rack until room temperature, about 1 hour. Loosely cover with plastic wrap and refrigerate until cold, at least 2 hours and up to 1 day.