Simplify the following text for a Grade 10 native English-speaking person.
Original: Curds are a dairy product obtained by curdling ( coagulating ) milk with rennet or an edible acidic substance such as lemon juice or vinegar , and then draining off the liquid portion ( called whey ) .
Simplified: Curds are a dairy product made by curdling milk with rennet or yeast so that it separates , and taking away the liquid part ( called whey ) .