In a large bowl, combine flour, baking powder, and salt.

Gradually add warm water, mixing until a soft dough forms.

Knead dough for 5 minutes. Cover and let rest for 15 minutes.

Heat about 1 inch of oil in a large skillet over medium-high heat.

Divide dough into 6 equal pieces. Roll each piece into a thin circle.

Carefully place each circle into the hot oil and fry for 2-3 minutes per side, until golden brown.

Remove from oil and drain on paper towels.

Brown ground beef in a skillet over medium heat. Drain any excess fat.

Stir in taco seasoning and water (as directed on the packet). Simmer for 5 minutes.

Top each fry bread with ground beef, lettuce, tomatoes, cheese, and sour cream (if desired).

Serve immediately.