Combine the yeast, water, and sugar in a mixing bowl and let stand for about 10 minutes or until foamy.
Combine the cottage cheese, dill, onion, sugar, eggs, butter, and baking powder with the yeast mixture. Add the flour and mix to make a dough.
Turn out onto a floured board and knead until smooth, about 12 to 15 minutes. Place the dough in a large greased bowl, cover, and let rise in a warm place for 1 hour.
Divide the dough into 3 loaves and place in 3 loaf pans. Cover the pans and set them in a warm place to rise until doubled.
Bake in a 350 degrees F oven for 50 minutes. Turn the oven off, remove the loaves from the pans, and return them to the oven for 5 minutes to firm. Cool on wire racks.