Goal and options: How do you make lemon juice?
output answer: You can squeeze juice manually using a citrus squeezer or using a food processor with a juicer component.

Goal and options: how do I make chocolate pasta?
output answer: add cocoa powder to the flour

Goal and options: How can I know how much paint is in a tightly sealed can?
output answer:
After you finish painting, and before you close the paint can, paint a line across the label to show the paint level, that way you'll know how much and what color the paint is without opening it.