Combine tomatoes, scallions, jalapeños and cilantro in a medium bowl.
Mash beans with chili powder and cumin in a large bowl with a fork or potato masher until almost smooth. Add cheese and the tomato mixture and stir until combined. Spread about 1/2 cup of the filling mixture on the bottom third of each tortilla. Roll snugly, tucking in the ends as you go. Wrap each burrito in heavy-duty foil. Freeze for up to 3 months.
To heat in the microwave: Unwrap a burrito and place on a microwave-safe plate. Cover with a paper towel and microwave on High until steaming hot throughout, 1 1/2 to 2 1/2 minutes.
To heat over a campfire: Place foil-wrapped burrito on a cooking grate over a medium to medium-hot fire. Cook, turning once or twice, until steaming hot throughout, 5 to 10 minutes if partially thawed, up to 15 minutes if frozen.
To make ahead: Freeze for up to 3 months; defrost for up to 1 day in a refrigerator or cold cooler.
2 1/2 starch, 1 high-fat protein, 1/2 lean protein, 1/2 vegetable