Shred the cheese and set aside.

Remove the seeds from the peppers and cut them into strips, and slice the onion into thin julienne strips.

Slice the mushrooms thickly.

In a little oil, sauté the onion, peppers, and mushrooms. Watch the cooking point.

Spread a tortilla with a little beans, add some of the sautéed mixture, and sprinkle with shredded cheese.