Preheat oven to 350°F. Butter and flour 9-inch tart pan.
Whisk eggs, granulated sugar, almond extract, and salt in a large bowl until frothy and pale, about one minute until the mixture thickens and the eggs are lemon-colored.
Add the butter, all-purpose flour, almond flour and orange zest and stir until incorporated.
Pour the mixture into prepared tart pan. Top with almonds and sanding sugar.
Bake cake until top is golden brown and a toothpick inserted into the center comes out clean about, 20–25 minutes.
Transfer pan to a wire rack and let cake cool slightly before serving.
This cake is simple and delicious served with coffee or tea.
Find almond flour at well-stocked grocery stores. Typically Trader Joes and Whole Foods carries it or get it online at Amazon. Bob's Red Mill is a good brand.
If you don't have sanding sugar you can leave it off or find it online or Williams Sonoma and Sur La Table usually stock it.