You can heat up mustard.
Mustard can be heated up in the microwave or on the stove, in the oven etc.
Mustard is heated up a lot when making some certain dishes and it can be heated up safely.
You can microwave ketchup however you should not microwave ketchup because when the ketchup heats up it turns to steam and burns and then explodes.
As you microwave ketchup, the liquid part in tomato ketchup turns to steam and the remaining tomato pulp starts burning.
As a result, it loses its flavor and tastes really bad. If steam cannot escape then your ketchup may even explode!
You don't need to cover food in the microwave when cooking.
However covering the food in the microwave when cooking is recommended for best results.
Because the heat circulates when cooking the food in the microwave.
keeping food covered lightly helps ensure that the food heats and reheats evenly, doesn't overcook and tastes better.
Yes you can microwave salad dressing to heat it up.
Just place the salad dressing in a microwave safe bowl or container and heat it for 30 seconds or so until it's warmed up.
Foods that will explode in the microwave are.
Potatoes (unless you poke holes before cooking)
Shelled eggs.
Tomatoes and tomato sauce.
Lemons.
Limes.
Oranges.
Hot dogs.
Spaghetti squash.
Some foods explode in the microwave due to the high water content or water content in the food.
As the microwave rapidly heats up the food the water heats up as well and with nowhere to vent the water escapes as steam when the pressure builds up in the food and explodes.
Similar to soups that are heated too long the water and liquid in the soup boils due to the high temperature and then explodes all over the microwave.
If the food has a high water content, like an egg or potato, the water expands and turns to steam.
Without a way for the steam to escape, the internal pressure rapidly builds until the food explodes.
Soup explodes in the microwave when it is heated unevenly.
This can happen when a liquid doesn't heat evenly in the microwave, causing it to build up steam pressure in one area.
The soup will inevitably explode when the pressure is too great.
In order to reduce the odds of food exploding in your microwave, you want to give the steam a place to escape.
Simply take a fork and pierce the food item several times.
It's the same technique you've been using all along before heating those frozen dinners.
To prevent splatter and encourage even heating, cover the soup with plastic wrap or a microwave-safe splatter cover.
If reheating soup from a can, follow the package instructions.
If reheating homemade soup, reheat for approximately one minute.
The time will vary depending on how much soup you are reheating.
You can also help some foods from exploding in the microwave by cooking foods such as soups with a vented cover that has holes for the heat and steam to escape.
The cover will contain the soup and liquid while still allowing the steam to escape.