Pour 1 cup warm watermelon juice into large bowl; sprinkle yeast over. Let stand until mixture is foamy, about 10 minutes. Mix in ¼ cup oil and salt. Combine both flours in medium bowl. Stir enough flour mixture into yeast mixture; once mixed, take out and knead on floured surface until smooth and elastic. About 10 minutes. Spray large bowl with nonstick spray; add dough and turn to coat. Cover bowl with plastic wrap. Let it rise and shine for about 1 hours.

Combine all veggie ingredients in a bowl and mix. Punch dough down. Divide into 4 equal pieces. Warp again; let it rise for about 10 minutes. Preheat over to 425 degrees. Roll out each dough piece on floured surface to about a 7-inch square or water ever shape you end up. Spray 2 large baking sheets with nonstick spray. Transfer breads to sheets. Top each with ¼ of topping. Bake breads until cooked through and brown on bottom, about 12-15 minutes. Serve warm.

Source:

Watermelon.org