Place the eggs in a large pot and cover with 1 inch of water. Bring to a boil. Once boiling, turn off the heat, cover and pot and let the eggs stand for 10 minutes. Then, drain the pot and cover with cold water for 10 minutes.
Peel the eggs and slice in half length wise. Remove the yolks and place into a bowl, mashing them up with a fork. Add in the yogurt, mustard and salt and mix until smooth.
Put the yolk mixture into a piping bag and fill up the whites, sprinkling with paprika.