For base:
In a large bowl, mix the water, sugar and yeast. Let it sit for 5-10 mins until frothy. This means that the yeast is active. Add the flours, flaxseed, milk, salt and knead until it comes together. Add the olive oil and knead till the dough is smooth (around 5 minutes). Cover and keep aside until doubled in volume. This could take 30 mins-1 hour depending on the weather.
Divide into 3 or 4 balls and keep aside.
For sauce:
Heat the oil, saute the garlic and onions until soft (around 3-5 mins), do not brown the onions. Add all remaining ingredients, and simmer for 3-4 minutes. Remove into a bowl and keep aside. You can make this ahead of time and refrigerate in air tight container.
Keep the toppings of your choice and mozzarella cheese ready.
Preheat the grill to around 200C / oven to 180C.
Grease a large square of tin foil with olive oil. Place the ball of dough and with fingers stretch it out by pressing, into 7-8" diameter circle. Brush with oil and allow this to rest for 5 minutes. Spread the pizza sauce (2 tbsp) evenly over this. Top with cheese (sliced or grated) and then with the toppings of your choice (olives, jalapenos, bell pepper, onions etc.). Bake for 25 minutes at 180C or grill for 10-15 mins (not directly over the coals), add more time for a stuffed (cheese burst) pizza.
Cut into wedges and eat immediately.