Combine flour, salt, and oil for the dough.

In a separate bowl, beat egg yolks, water, and baking powder.

Add the egg mixture to the flour mixture.

Knead the dough until smooth.

Roll out the dough on a floured surface.

Cut the dough into circles using a 3-inch diameter glass or cup.

For the filling, saute the diced onion in oil until softened.

Add ground beef to the sauteed onion and brown for about 5 minutes. Remove from heat and cool.

Once the meat and onion mixture has cooled, add salt, pepper, garlic powder, paprika, egg, and breadcrumbs. Mix well.

Place 1 tablespoon of filling onto each dough circle.

Fold the dough over the meat mixture to form a dumpling-like triangle.

Moisten the edges of the dough with water to seal the seams.

Boil the kreplach for 20 minutes, until they float to the top.

Serve in soup or as a side dish. Alternatively, fry until golden brown and serve as a side dish.