I recently have really been trying to control my weight and cut my sugar so I've rehauled my food. I make sure to make my lunch in the morning and take it with me to work.
This usually takes me 10-15 minutes in the morning.
I Buy frozen veggies in the bags, normally broccoli/cauliflower mix, followed by a different bag mix of some carrot onion and bell peppers. These are usually like a dollar for a 12-16 oz bag here in California.
: I prep these in 2 main ways, i either steam or boil, and depending on what I'm adding after i might sautee them in the pan as well. I make sure to use different spices each day so i dont get bored. sometimes I just eat it straight up plain as the peppers have some sweetness and it can make a nice change. They come prechopped so its as easy and putting them in and tossing some spices on it.
I normally grill chicken or make burgers out of ground beef/turkey/bison. I don't always marinade but I do always season, again with different things each day so I don't get bored. (sometimes ill cut paneer/tofu into slices and grill them if I feel tired of meat or want something different)
Usually, I have some yogurt, cottage cheese, fruit (normally some type of berry, grapes, an apple, or prunes, i imagine you could have nuts, I'm allergic tho). All of these things are ready to go grab and pack things. Sometimes ill make mashed potatoes the night before and leave a little for lunch the next day.
Drink: Water is king, if it's too boring you can get those flavorings but be mindful about which ones you get cuz some can have lots of unwanted sugar. I have a microwave at work so I take some instant coffee and a stevia packet (you could take sugar or honey) so I can make a coffee at work if I want to, and if I don't use it I can just take it the next day.
I use different spice mixes i found at my local supermarket I am not that great at cooking but I know I'm a lazy fuck and this is just the best way for me to prep a healthy meal in a short amount of time and include variety without taking too much time.