Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
In a large mixing bowl, whisk together the flour, baking powder, baking soda, salt, pepper, and dill.
Add the grated butter and work it into the flour with your hands until the mixture resembles coarse crumbs.
In a medium bowl, whisk the eggs, cottage cheese until relatively smooth. It doesn’t have to be perfectly blended, just well mixed.
Pour the wet mixture into the dry ingredients and fold gently with a spatula or wooden spoon. Once the dough starts to come together, add the shredded cheese and chopped smoked salmon. Stir just until combined.
Lightly flour your work surface and turn out the dough. Pat it into a rough rectangle about 8x12 inches and around 1 inch thick. Use a sharp knife or bench scraper to cut it into 12 rectangular biscuits.
Transfer the biscuits to your parchment-lined baking sheet, spacing them slightly apart. If you want a glossy, golden top, brush them with a little olive oil or melted butter.
Bake for 18–20 minutes, or until the biscuits are puffed, golden, and lightly crisp at the edges. The tops should spring back gently when pressed.
Let the biscuits cool on the baking sheet for 5 minutes before serving.
Notes
Use full-fat cottage cheese - for the best flavor and texture. Don’t overmix the dough - stop as soon as the flour is mostly incorporated. Flour your surface lightly - too much flour during shaping can toughen the dough. Brush the tops - a quick swipe of olive oil or melted butter before baking helps the tops brown beautifully.