This is delicious on falafel or ta'amia or just to dip flatbread in.
1/4 c tahini
1/2 c lemon juice
1/2 c yogurt
1/2 tsp crushed red pepper
1/2 tsp salt, or to taste
Garlic or other herbs to taste
Combine the tahini and lemon juice. This will take some time, but keep stirring and mashing till they are combined. Then add the rest of the ingredients. It's best to let it sit for at least an hour before serving, and it lasts a week in the fridge.
Or dump everything in the blender.