What is the quickest meal to prepare that holds enough nutrients and calories to make it to a late lunch?

Try a high fiber cereal or granola with milk and a fruit like a banana, apple or orange. You can even slice some fruit and put it directly in the cereal. A balanced meal will keep you more full than just one item.

Oatmeal with dried fruits in it, and almond milk. Alternatively a hardboiled egg and a single piece of sourdough toast, and a piece of fruit

Peanut butter, jelly & banana sandwich. Nuts are very filling so using chunky peanut butter is a must, I’m a sucker for sweet jam but I’ve substituted fruit spread for a healthier lower sugar alternative and slice whatever you can fit in between for the banana And just eat the rest.

What works best to last a long morning is a breakfast that has nutrients that take longer to digest, such as protein. A good and healthy breakfast to go for when you wanna make it to a late lunch would be some eggs, maybe some oatmeal or whole grain bread, some nuts and fruits, or if you still feel a little hungry or snacky afterwards, some nuts will do the trick for a quick and not too filling snack that will ruin your lunch.

Oats. You can also make them beforehand and let sit in the fridge overnight , but I prefere them 'freshly' made. You can also make a quick omelet.

I like 1/2 oatmeal with a couple tablespoons of sugar free jam added. That along with some egg whites and a cup of coffee will fuel me for most of the day.

I think a banana or an apple. But, you don’t really prepare them. In my opinion, the quickest for me to prepare is some over easy eggs and an apple.

I’d suggest a salad, but make sure you get enough of all food groups in it - veggies, beans, some protein (tofu, chicken, tuna, etc), maybe even throw in some pasta/ (sweet) potatoes.. Definitely quick and easy and can help you get rid of some leftovers. I try not to overdo it on the dressing, just a light drizzle of olive oil.

Personally, I eat a serving of oatmeal and a chobani Greek yogurt with granola. If I’m really hungry, I’ll add a piece of toast or fresh fruit.

If you can cook, Omelette with some veggies. If not, yogurt+oats+nuts+some fruits(banana, apple..) If still too much time, prepare some protein bars night ahead.