Preheat oven to 400 degrees.

Brown beef in a skillet until fully cooked. Drain off any grease.

Add taco seasoning and water to beef and cook for a few minutes. Set aside.

Brush both sides of the tortillas with oil and place on a baking sheet.

Bake tortillas for 2 minutes at 400 degrees. Turn tortillas and bake for 2 more minutes.

Spread beans over 4 of the baked tortillas followed by the prepared ground beef. Top each with one of the remaining tortillas. Then top each with 1/4 cup of the shredded cheese followed by tomatoes and green onions.

Place under the broiler until the cheese is melted.

Slice each pizza into 4 slices and top with a spoonful of sour cream to serve. Serves 4.