To my rice I like to add chopped plum tomatoes & fresh jalapenos & radishes, ripe olives, a handful of frozen corn, and lots of shredded cheddar/pepperjack. Sometimes its nice to skip the usual black beans and add a smear of canned refried beans to help it all stick together.

We have a little restaurant in town and I always get their veggie burrito because in addition to beans, rice and salsa they put all kinds of grilled veggies -- onions, summer squash, zucchini, mushrooms, peppers -- and lots of avocado slices. So whenever I have leftover grilled veggies I try to recreate their burrito.

MTMitchell - The grilled vegetables sound delicious! Do you use any particular spices? I like to thin Greek yogurt to simulate sour cream.

Everything really. Tzatziki, hummus, sun dried tomatoes, roasted peppers, fresh leafy greens like mustard greens or kale or baby spinach, grilled tofu etc...

Okay, this is my contribution http://food52.com/recipes... Although the recipe calls for pork belly (which is really good) you can leave that out if you prefer.
Eggs are also really good in burritos unless you are a vegan.

Potatoes, any variety and cooked in any way.
A tofu scramble, made with herbs and/or spices also makes a nice filling for a burrito.

roasted sweet potatoes or butternut squash with black beans makes for awesome burritos.

Black beans, mushrooms, in a coconut cream sauce, top with brown rice, sprouts, arugula, thinly slice red onion, avocado, greek yogurt and roasted salsa verde...

Try this: roasted sweet potato puree, hummus,tahini sauce

Shredded & marinated kale & Brussels sprouts with crumbled cojita cheese is good and different. Had it in a soft taco and it was delicious!

sauteed chard, pickled onions, shredded cotija, black beans

sauteed chard, pickled onions, shredded cotija, black beans

sauteed chard, pickled onions, shredded cotija, black beans

sauteed chard, pickled onions, shredded cotija, black beans

sauteed chard, pickled onions, shredded cotija, black beans

sauteed chard, pickled onions, shredded cotija, black beans

sauteed chard, pickled onions, shredded cotija, black beans

I love to roast cubed sweet potato, zucchini, bell peppers, and onions (and jalapenos if you like it spicy) with olive oil, salt, and cumin. Once they are roasted, I toss them in lime juice and chopped cilantro, then add black beans. Super yummy and filling vegetarian burrito! Add a little creme fraiche and avacados and you're in heaven :)

sautee mushrooms and spinach (or other leafy greens)with cumin, garlic, a little chili powder, salt and pepper. Add your black beans and rice. Top with queso fresco. YUM! I like it simple.

If I know I'm having a busy week, I'll cook up all my ingredients on one night and eat leftovers all week. I try to recreate the "chipotle burrito bowl" so I make rice, black beans, corn, sauteed green peppers and onions, cheese, sour cream, and guacamole. I could eat this every day forever

Thanks to everyone for all of your great ideas! I decided to try making a homemade hot sauce out of a jar of hot peppers I've been fermenting and it was delicious with the rice and beans. I took about 10 peppers and rough chopped them, added a bit of filtered water and white wine vinegar, and blended well with my immersion blender. Delicious!

A little late, but I love tempeh cooked with a little veggie broth, liquid smoke, garlic, maple syrup and soy sauce until glossy. That is good with everything - on sandwiches, as "bacon" with breakfast, burritos, you name it.

I love putting leftover chinese food in my burritos! Or a tofu scramble with veggies and potatoes to make a breakfast burrito.