Timing is everything when it comes to cooking mussels. If you overcook them, they'll be tough and rubbery - yuck! But if you undercook them, they might not be safe to eat, which is a major no-no.
Think of it like watching your favorite TV show - you want to catch the good parts, but if you miss the timing, you might end up with a bunch of spoilers. With mussels, you want to catch them at the perfect moment, when they're cooked just right and full of flavor.
So, what's the best way to check if your mussels are cooked? Well, it's pretty straightforward: just open one up and take a peek inside. If it's not opened, give it a bit more time and try again - it's like checking if your toast is golden brown and crispy.
How Do You Prepare Frozen Cooked Mussels at Nancy Ramirez blog