I dine out about 3 times a week.

Honestly, just leftovers, otherwise they get lost in the fridge which is both annoying and wasteful. My husband likes to bring bagged salad kits) with some leftover protein and dressing on the side to mix in).
I am really trying to cut back on spending money too and have been bringing my coffee every day this week. Baby steps!

Turkey and swiss on whole wheat. Since 2014.

Lots of leftovers that do well as lunches:
Red lentil dal and rice
Sheetpan chicken shawarma
Black beans/black lentils and some rice too
Turkey stuffed bell peppers
Various beef stews

I reheat at work.

I bulk-prep a large grain/bean/veggie bowl on Sunday, and heat up a portion of it each day.

Some of my current favorites:
1 cup cooked quinoa, 1 can chickpeas, 1 can red kidney beans, 1 diced red bell pepper, 1/2 cup sliced kalamata olives, big bunch of arugula, 2 tsp dried oregano, 1/2 cup chopped parsley. In a separate container, 1 diced cucumber, 1 pint halved cherry tomatoes, 1/2 cup crumbled feta. Each day, heat a portion of the grain mixture, drizzle with olive oil and lemon juice, and add a portion of the cucumber/veggie.

Cabbage soup - 2 pieces diced bacon, one diced onion, 1 inch knob of ginger (grated), 1 pint sliced mushrooms, 2 cans white beans, 1 whole head of green or Napa cabbage (diced), 1/2 tsp red pepper flakes, juice from 1 whole lemon, 1 cup cooked brown rice, chicken broth..

Loaded potato - 2 pieces diced bacon, 3 leeks (white part only, chopped), 1 head broccoli florets, 3 large white potatoes (diced), 1 can black beans, chicken broth. Also good with cauliflower instead of potato, or you can some cooked ground chicken for more protein. Heat a portion, then sprinkle on some shredded cheese.

Do you not have access to a microwave, or do you just prefer not to use them?

Leftovers. A sandwich or a protein shake and fruit if we don't have enough leftovers.

Beef less stew
https://www.forksoverknives.com/recipes/vegan-soups-stews/best-ever-beefless-stew/

Greek green beans with tomatoes, potato, basil
https://instantpot.com/blogs/recipes/fasolakia-green-beans-and-potatoes-in-olive-oil-tomato-sauce

Soy curls in bbq sauce in whole wheat wrap

I normally bring leftovers. Today was red beans and rice.

^ sorry, I don't eat this hot. But you could pack the roasted veggies separate and warm them before combining.

Lately I've been taking salad with arugula, roasted sweet potatoes/cauliflower/carrots and roasted chickpeas (tons of spices including tomato paste, smoked paprika, onions, garlic, and a touch of brown sugar), homemade dijon vinaigerette, dried cranberries, parm, and sometimes croutons. I personally do roasted balsamic peppers but totally not necessary and you can add any veggies you want. I am fairly heavy handed on the chunky parm and chickpeas (and light on the oil) so I feel good about the protein and calories overall.

Cold turkey sanwich. I guess you could toast it in the oven.

Usually leftovers from dinner the night before. I know it's not hot, but if not that, I'll usually make tuna or egg salad and put it on an English muffin.

Nothing. I pack fruit and oatmeal for breakfast, buy a salad, and then bring mixed nuts for a snack. I guess you could pack a tomatoless, pepperless salad and heat it up.

Resolution is to spend less money on lunch out. What hot lunches do you pack at work that travel well? No junk food, tomatos, or peppers please.