I am not a vegetarian, but I am a healthy eater and don’t eat meat with every meal.
Being vegetarian and eating healthy are two different things, though you can of course be both.
The most important thing is to meal plan! Pick a designated day that you meal plan, write a shopping list based ONLY off your meal plan, and then only pick that stuff up from the store. I write my meal plan out on Sunday mornings. I spend some of Sunday cooking up a few big meals to portion out in the freezer, and then I go shopping on Monday and Thursday for the week (to ensure it’s all fresh) on my way home, all using the same list.
You’re grabbing string cheese (for breakfast??) because it is there. If it’s not there – you can’t eat it.
Can you eat breakfast at work? That’s what I do if I’m running late. I have some muesli kept at work and we always have milk for coffee. Then I just eat it at my desk. But usually I have two eggs, a cup of fresh spinach and half an avocado with a bit of lemon for breakfast. Takes 2 seconds to prep.
For lunch, I will typically meal prep on Sunday something like soup, bean and zucchini burgers, or a curry. I try to eat meatless at work, to force myself to get more veggies. If I forget lunch or something, I have sourdough toast with peanut butter or vegemite. This week I have a pumpkin, carrot and sweet potato soup which is delicious. Took me about 30 minute of actual kitchen time on the weekend and made 5 servings. The rest, of the time, it was just on the stove while I did some housework.
My favourite vegetarian dish is a potato yellow curry. It’s an indian dish which is delicious and I served it up to my carnivore husband – and he didn’t even notice it was vego.
Also, agree with PP that you shouldn’t have to make two meals every night, but if you don’t want to stop doing that, you can also meal prep for that so you can focus on your own meals for the night. I meal-prep for my husbands lunches using the slow-cooker or stovetop to make things like stews, stir frys with rice, curry with rice, pasta dishes, or anything else which freezes well. Then I name and date it, and he can take it and go.