In the bowl of your stand mixer, add room temperature butter, sugar, and ricotta cheese. Cream wet ingredients together with the paddle attachment until light and fluffy-- about 3-4 minutes.
One at a time, add in eggs, mixing for 30 seconds between additions.
Add lemon zest, lemon juice, and vanilla and mix for 30 seconds.
In a separate bowl, combine dry ingredients. Using a rubber spatula, fold dry ingredients to the wet ingredients a little at a time until just combined.
Coat blueberries in a tablespoon of flour (See note). Fold in fresh blueberries. Use a spatula to gently incorporate into the cake batter.
Butter a standard loaf pan very well and pour cake batter into pan.
Bake cake in preheated oven for around 60 minutes, or until a toothpick comes out cleanly. Allow to cool before releasing from pan.
Notes
Coat your blueberries in a tablespoon or two of flour to prevent them from sinking to the bottom of the cake as it bakes.