Pasta needs to cook in rapidly boiling water, so a double boiler won't work that well for cooking pasta.
When you cook something in a double boiler, you are not actually double boiling something. You put water in the bottom part of the double boiler, and the food in the top part. This lets the food item cook slowly. This is often done when melting chocolate.
Poaching
Two options are a dutch oven and a double boiler.
Anyone can cook pasta. This can be anyone whether a chef or a bad cook.
You can cook the pasta earlier in the day, or the day before, then refrigerate it. You can then use it in a pasta salad or refry it.
I always put double amount of water to pasta. e.g. 1 cup of pasta = 2 cups water. never boil pasta in a pan with the lid on. The pan has to be uncovered.
Pasta
The only way you can cook raw pasta in a oven is by layering the pasta with a sauce, like a meat sauce or white sauce.
No. It won't get the temperature of the oil hot enough.
Of course she cooks pasta you wierdo!
I'm not sure it's really double, but it definitely expands.
Dried pasta has a better shelf live. Fresh pasta will cook much faster. Fresh pasta has to be refrigerated while dried pasta can be kept on the shelf.