Preheat your oven to 425°F and line a baking sheet with parchment paper.
Slice the zucchini into thin rounds and the red bell pepper into narrow strips.
Arrange the vegetables on the baking sheet and roast for 10 minutes until they begin to soften.
In a medium mixing bowl, combine the Greek yogurt, spelt flour, liquid egg whites, baking powder, and sea salt.
Stir until a sticky dough forms, then knead lightly on a floured surface for about 1 minute until smooth.
Press the dough into a 10-inch circle on a fresh piece of parchment paper and par-bake for 8 minutes.
Remove the crust from the oven and spread the marinara sauce evenly across the surface.
Top with the part-skim mozzarella, roasted zucchini, roasted peppers, nutritional yeast, and hemp hearts.
Return the pizza to the oven and bake for an additional 10-12 minutes until the cheese is bubbly and the crust is golden brown.
Garnish with fresh basil leaves, black pepper, and dried oregano before slicing and serving.