Burritos, tacos, and other stuff of that sort are your best friend. Super cheap, near damn effortless to prepare, highly customizable, and easy to make vegan. Use beans (refried, black, and/or pinto) in place of any meat to make it vegan. Put the beans, choice of veggies (lettuce, pico, jalapeños, and even mushrooms are great choices), and a sauce (or a few sauces) on a tortilla of your choice. The beans make it nice and filling, as it gives it quite a bit of protein.

I also recently found this tasty trick with portobello mushrooms. I’ll paste it from another comment:

Recently, I managed to make some strikingly good gluten-free vegan deli slices using portabella mushrooms.

I don’t have any issues with consuming gluten, but I can’t use gluten to make vegan deli slices because VWG/seitan is not readily available where I am, and pre-packaged deli slices like Tofurky are expensive, so I started to seek different solutions.

Tofu is alright, especially since it’s quite rich in protein, but I still feel like the texture doesn’t come close enough.

Once I sliced some portabella mushrooms really damn thin and seasoned them just right, I realized that the texture outcome is perfect. It goes so good on a sandwich, but ya gotta cut it real thin.

Typically, the seasoning I use is:

• 1/4 cup soy sauce
• 2 tbsp EVOO
• 1/4 tsp garlic powder
• 1/4 tsp onion powder
• 1/2 tsp smoked paprika
• 1.5 tsp liquid smoke
• 2 tbsp agave
• 2 tsp rice vinegar
• a pinch of cinnamon

Coat the thin slices in this marinade in a container.

I use the microwave, and I microwave it for a fairly lengthy amount of time (5 minutes) to release the moisture and give it that perfect texture. I put a lid on the container and just crack it slightly.

Would highly recommend! I put nutritional yeast and sriracha on it as a sandwich, and I eat it with BBQ beans and non-mayo coleslaw on the side.