Preheat the oven to 175 degrees. Spray a 12-compartment muffin tin with spray oil or line with paper muffin liners. Melt and cool the butter. Peel the strawberries and cut into pieces.
In a large bowl, stir together flour, baking powder, salt and baking soda. In a medium bowl, grind the lemon zest and sugar. Whisk with eggs, ricotta cheese, buttermilk, vanilla extract, lemon juice and ghee.
Pour the egg mixture into the dry ingredients and stir until smooth. Add chopped strawberries and stir gently until the berries are evenly distributed throughout the dough.
Divide the dough evenly between the 12 muffin pan. Bake until a toothpick inserted into the center of the muffins comes out clean, about 18-22 minutes. Remove the dish from the oven and place it on a rack, let it cool slightly for about 5 minutes. Then remove the muffins from the mold with a knife and allow to cool completely.