SOUR DOUGH RECIPES

Steps:

• Tip four cups of flour onto your work surface, make a shallow well.
• Add sour cream in. Mix until combined - with your hands or with an electric mixer.
• If the dough feels too sticky to handle, add more flour.
• Dust both hands with flour and start kneading to form the dough.  
• Cover the dough with a cloth or a large bowl. Set aside for 20-30 minutes. You can let the dough rest longer, even up to a few hours.
• Dust the worktop with some extra flour and transfer the dough onto it. Knead the dough for a minute or two. Cut a smaller piece of the dough off and roll it out - the thinner, the better. 
• Cut out the circles - I use a rim of a glass, but a round cookie cutter works too. The size is up to you, but roughly 3 inches (8 cm) seems optimal.
• Scoop 1 tablespoon of pierogi filling of your choice and place it in the center of each circle. 
• Press the edges and seal each dumpling.
• Bring a large pot of water to boil, then reduce the heat to medium. Drop in pierogi in small batches, a few at the time. Wait for them to float, once they do - continue cooking for another minute. Remove them with a slotted spoon onto a plate.
• Continue until you’re out of pierogi.
• Serve with melted butter or another topping of your choice. 
• If you prefer a crispier skin, melt some butter on a frying pan. Fry dumplings on both sides until golden.

Steps:

• In 1-quart saucepan, mix brown sugar and cornstarch.
• Add enough water to reserved pineapple juice to measure 1/2 cup; stir into sugar mixture. Stir in vinegar and soy sauce.
• Heat to boiling over medium heat, stirring constantly. Boil and stir 1 minute. Stir in pineapple and bell pepper.
• Use sauce immediately, or cover and refrigerate up to 2 weeks or freeze up to 1 year. Serve with pork, poultry and seafood.