Healthy Lemon Courgette Muffins (zucchini Muffins)

"These lemon courgette muffins skip the butter and use heart-healthy olive oil instead. One bowl, one spoon and just a few ingredients you probably already have, and these moist and fluffy muffins will be perfect for breakfast or a healthy snack. These muffins definitely lean towards the sweet side rather than the savoury side of the muffins family. They are truly very delicious as they are, but they are a blank canvas and could very much benefit from some add-ins that will take them from everyday muffin to something spectacular. I'm a very big fan of simple baking for breakfast and if you are too, then you'll love my one bowl banana chocolate muffins, lemon blueberry loaf and my blueberry scones."