Greece's ancient winter staple: fermented cracked wheat and sheep's milk trahanas pasta simmered into a velvety, comforting porridge soup with browned butter and feta.
In a heavy saucepan, bring broth, olive oil, and grated tomato (if using) to a boil with a pinch of salt.
Rain in the trahanas while stirring continuously with a wooden spoon so it doesn't clump.
Reduce heat to medium-low and simmer gently for 15-18 minutes, stirring frequently, until the trahanas breaks down into a thick, velvety porridge soup.
Melt butter into the soup, fold in half the crumbled feta, and ladle into bowls. Top with remaining feta and black pepper. Serve warm with crusty bread.