You don't have to get a burrito at Chipotle. Try my salad recipe:

Salad with no dressing (you don't need their sugary dressing when you have salsa).

Black or pinto beans.

Optionally, a bit of brown rice, but they will give you too much unless you ask for only a sprinkle of it.

Onions and peppers.

Chicken or whatever meat you like.

Corn, pico de gallo, and medium salsa.

Guacamole. "I know it's extra."

And some of the chopped lettuce at the end of the line, especially if you're getting it to go. "So the guac doesn't stick to the lid."

Now you have mostly vegetables, some meat, some beans, and not much in the way of grains. And it makes two full meals!