This completely depends on whether it's frozen, just made, cooked, uncooked, ingredients, etc. Your question isn't specific enough to answer properly. HOWEVER, let's assume its' a cooked meat lasagna and you had it for dinner but you forgot to refrigerate it before going to bed. If you live in a cold climate and the house is chilly all night, you'll probably be okay if you put it into a fridge immediately when you wake up. If you live in Arizona or Guam, you've just lost your lasagna. The meat and the pasta will start to grow things you can't see within a couple of hours of sitting out of the fridge. Personally, I wouldn't chance eating a lasagna that sat out all night unless I was absolutely broke and cramming for a test or so hungover that I couldn't get to the store. Then, it usually doesn't matter as long as it fills the void until something better comes along.
Cooked eggs can last in the refrigerator for up to one week.
Cooked spaghetti can last in the refrigerator for about 3-5 days before it goes bad.
3-5 days
Cooked turkey can last in the refrigerator for 3 to 4 days before it should be consumed or discarded.
Maybe up to 5 days.
i am hoping it will keep for a couple of days.
The longer it stays in the refrigerator the mushier it will become. This should be cooked as soon as it is made to prevent mushyness.
Cooked lentils typically last for about 3-5 days in the refrigerator before they spoil.
Cooked chicken should be good stored in the refrigerator for 3 to 4 days.
Pecan pie should be safe for 3 - 5 days if stored in the refrigerator.
This can spoil if not kept in the refrigerator. Keep it in an airtight container to prevent drying out. It can last up to a week in the refrigerator.
For best quality, it should be used within a couple days.