In a mortar and pestle (or a zibdiya, a Gazan clay bowl, if you have one), crush the dill seeds and salt until powder consistency. Add the onion and chili pepper, and mash until incorporated, but not mushy. Then add the tomatoes and fresh dill and continue mashing until combined.
Add the lemonjuice and olive oil and mix with a spoon. Adjust salt and pepper to taste.