Given a paragraph about cooking, and a set of conversational question answers about the paragraph, generate a relevant question to the topic of the paragraph. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`.
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Question: CONTEXT: Marshmallows expand so much because the water in them becomes steam, and gas takes up a LOT more volume than liquid. Specifically, 1 mL of water becomes ~1.36 LITERS of vapor, before it gets heated further. That's 1000-fold expansion, before you add additional expansion as the gas is heated. Marshmallows don't have all that much water content, but when it's trapped in a stretchy gelatin matrix that holds gas readily, it only takes a bit to blow the whole thing up like a balloon.You are correct that the gas expansion on its own is insufficient; unless I've badly muddled my calculations, gas expansion from 20C to ~150C (caramelization temperature) will increase the gas volume by under 50%.  <sep>  Q: Why do marshmallows poof up so huge when put in the microwave? A: Marshmallows expand so much because the water in them becomes steam, and gas takes up a LOT more volume than liquid. Sp  Q: How big can they puff up? A: Specifically, 1 mL of water becomes ~1.36 LITERS of vapor, before it gets heated further 

Answer: How long do you put them in the mircorwave for?


Question: CONTEXT: As long as they aren't spoiled they'll be fine for a crumble/crisp/cobbler. You'll want to have someone else taste them to make sure first. They may need less sugar and less or no precooking. If they are really, really mushy then you might want to add some firmer plums or other fruit to give some texture.  <sep>  Q: Are mushy plums OK to use in cooking? A: As long as they aren't spoiled they'll be fine for a crumble/crisp/cobbler  Q: I have some plums that have started to go soft and squishy. How do I tell if they are still OK? A: You'll want to have someone else taste them to make sure first 

Answer: Is there any other way to tell?


Question: CONTEXT: The enamel is brittle, especially when scratched. cast iron is often cheaper. They clean differently: stainless is initially a little harder to clean, but polishes with use making cleaning easier. Food initially sticks less to enamel, but scratches and cracks change this. using steel wool to clean stainless improves the finish, using it to clean enamel scratches the finish. If you are gentle with enamel it should last decades,stainless will survive children beating on it with almost anything, and can be passed to your grandchildren. thinner metal will heat quicker and cool quicker, but will develop hot spots. Thicker metal will heat more evenly, but heats and cools slower.  <sep>  Q: I'd like to buy myself the best roasting pan and I'm stuck on whether to get an Enameled Cast Iron or a thicker Stainless Steel/tri-ply type pan. I'm looking for the pro/cons of each, and any personal experience with either variety. A: The enamel is brittle, especially when scratched. cast iron is often cheaper. They clean differently: stainless is initially a little harder to clean, but polishes with use making cleaning easier 

Answer:
Is either one better at creating a fond, making gravy, or cooking down veggies/onions?