Heat oven to 375-F.
Grease twelve 3-inch muffin-pan cups.
In large bowl, combine flour, sugar, baking powder, baking soda, and salt; add cloves, if desired.
Add blueberries and toss to coat with flour mixture; set aside.
In medium-size microwave-safe bowl, microwave butter on medium (50 percent) 10 to 15 seconds, or until melted.
Cool slightly, then add yogurt, egg, lemon rind, and lemon and vanilla extracts; beat until blended.
Stir yogurt mixture into flour-berry mixture just until blended and dry ingredients are moistened
Divide batter among muffin-pan cups.
Bake 20 to 25 minutes or until muffins spring back when gently pressed with fingertip.
Cool in pan on wire rack 5 minutes. Remove muffins from cups and serve warm.