In a large bowl, combine whole wheat flour, all-purpose flour, salt, cumin, yeast, and black pepper.
Add water and mix until a dough is formed.
Knead the dough for a few minutes until smooth.
Cover and let it rise for about 1 hour.
Preheat oven to 375°F.
Punch down the dough and flatten it into a rectangle.
Sprinkle cheese and green chilis over the dough.
Roll up the dough tightly and place it on a baking sheet.
Bake for 30-35 minutes or until golden brown.
Let it cool before slicing and serving.