Lemon, pine nuts, thyme, and cornmeal are blended in the bowl of an electric mixer. The finished quick bread is crumbly and savory-sweet.
Preheat oven to 325 degrees. Butter a 9-by-5-inch loaf pan. Dust with flour, and tap out excess; set aside. Put butter and sugar into the bowl of an electric mixer fitted with the paddle attachment. Mix on medium-high speed until pale and fluffy, about 3 minutes.
Add lemon zest; mix 1 minute. Add eggs, 1 at a time, mixing well after each addition. Mix in lemon juice and thyme. Add flour, cornmeal, baking powder, and salt, and mix until just combined. Stir in chopped pine nuts.
Pour batter into prepared pan. Sprinkle with pine nuts. Bake until a cake tester inserted into center comes out clean, 50 to 55 minutes. Let cool completely on a wire rack. Garnish with thyme.
Bread can be stored in an airtight container at room temperature up to 2 days.