Mix Wet Ingredients: Preheat oven to 350°F (180°C). Grease or line a 12-cup muffin pan.In a large bowl, whisk together 1 large egg, ¾ cup sugar, ¾ cup Greek yogurt, 2 tablespoons milk, ¼ cup olive oil, the grated zest of 1 lemon, ¼ cup lemon juice, and 2 teaspoons vanilla extract until smooth.
Add Dry Ingredients: Add 1⅔ cups all-purpose flour, 2 teaspoons baking powder, ½ teaspoon baking soda, and ¼ teaspoon salt (sift if you can).Mix gently until just combined—don’t overmix.Fold in 1½ cups blueberries carefully.
Fill the pan: Divide the batter evenly into the muffin cups.Optional: sprinkle brown sugar or add shaved/slivered almonds on top.
Bake & Cool: Bake at 350°F (180°C) for about 25 minutes. Check doneness with a toothpick—it should come out clean or with a few crumbs. Cool in the pan for 10 minutes, then move to a rack to cool completely.