Whisk together all purpose flour, whole wheat flour, yeast, garlic powder, and salt in a large bowl. Stir in water and oil and combine well; do not over-mix.
Move dough to a floured surface and knead for 5 minutes until smooth and flexible.
Move dough to a greased bowl and flip over to grease top. Wrap with plastic wrap and let rise for 30 minutes in a warm place. Dough should be doubled.
Punch down dough and split in two pieces. Roll out each piece into a 12 inch disk. Move each to a greased 12 inch round pizza pan. Make holes in dough with a fork. Move to an oven heated to 400 degrees F and cook for 8 to 10 minutes. Crust should be slightly browned.
Meanwhile, mix together all sauce ingredients in a saucepan and bring to a boil. Simmer over medium-low heat for 15 to 18 minutes. Stir frequently.
While sauce is cooking, heat vegetables and oil in a small skillet until soft.
To finish, spoon 1 cup sauce over each pizza crust along with vegetables and cheese. Move back to oven and bake for 12 to 15 minutes or until cheese is bubbling and melted. Serve warm and cut into 6 slices per pizza.