Prep the pan: Heat oven to 375°F (190°C). Line a 12-cup muffin tin with paper liners or grease well.
Whisk the wet ingredients: In a large bowl, whisk cottage cheese, eggs, oil, honey (or sugar), and vanilla until mostly smooth.
Small curds are fine.
Mix the dry ingredients: In a separate bowl, whisk flour, baking powder, baking soda, salt, and lemon zest.
Combine gently: Add dry ingredients to wet and stir with a spatula until just combined. The batter should be thick and a bit lumpy. Do not overmix.
Fold in berries: Toss blueberries with a teaspoon of flour if you like (helps reduce sinking), then fold into the batter with a few gentle turns.
Fill the cups: Divide batter evenly among muffin cups. Sprinkle tops with turbinado sugar if using.
Bake: Bake 16–20 minutes, until the tops are golden and a toothpick comes out clean or with a few moist crumbs.
Cool: Let muffins rest in the pan for 5 minutes, then transfer to a rack to cool completely.