Preheat oven to 400°F.
Pierce all 5 sweet potatoes several times with fork and roast directly on oven rack for 45 minutes, or until fork tender. Remove and allow to cool enough to handle. The skin will easily separate from the flesh of the potato once cooled.
Add the flax or chia seeds and water to a small bowl, whisk and let stand for 5 minutes to become viscous.
Peel 4 of the potatoes and mash in a large mixing bowl. Add the seed mixture, gfJules™ Flour, potato flakes, olive oil, apple cider vinegar, basil, oregano, garlic powder, sea salt, and red pepper flakes. Mix well.
Line a crisper or round pizza pan with parchment paper and lightly oil. Spoon the sweet potato mixture onto the parchment paper and use a spatula to spread it into a large circle on the pizza pan. Build up the edges as you would with regular pizza if you want a thicker crust edge, or spread the entire mixture evenly to distribute toppings to the crust edge. The mixture should be spread to an approximate thickness of ½ inch, but no more.
Bake in the preheated oven for 35-40 minutes or until the crust is set and the edges are starting to brown.
While crust is baking, heat oil in medium skillet over medium-low heat. Add onion and cook, stirring occasionally, until translucent. Add prepared vegetables (save kale or spinach to the last) to skillet and cook until tender. Add greens and cook until wilted. Remove from heat and add salt and pepper, to taste.
Scoop inside of potato into medium bowl and mash; add milk, herbs and spices and stir until smooth. Spread mixture onto cooked pizza crust.
Top with half of the cheese, cooked vegetables and then remaining cheese. Return pizza to the oven on broil at 450°F for 5-10 minutes, or until greens begin to crisp and cheese melts. Watch to be sure the toppings don’t burn.
Remove and allow to cool slightly before slicing.
Serves 6.