Spray a large saute pan with cooking spray and brown the chicken thighs in batches.

Add chopped onion, salt, and paprika to the pan and cook until the onion is softened.

Return the chicken to the pan and add 2 cups of water.

Cover the pan and cook for 1 hour, or until the chicken is tender.

Prepare the dumplings: Bring a large pot of water to a boil.

Mix flour, water, egg, and salt in a bowl and stir until smooth.

Drop spoonfuls of dough into the boiling water. Dip spoon in boiling water to prevent sticking.

Cover the pot and cook the dumplings for 15 minutes.

Drain the dumplings and add them to the chicken mixture.

Stir in light sour cream and cook uncovered until the sauce thickens.

Serve hot.