To make dough, dissolve yeast in warm water, let sit 5 minutes. Mix dry ingredients together. Add oil and water-yeast mixture. Knead for 10-15 minutes for best texture. An electric mixer is helpful, but not necessary.
Let dough rise for a minimum of 1 hour.
Heat oven to 450 F. Roll out dough on floured surface to 1/4-inch thickness. Place dough on baking sheet or pizza peel. Top with tomatoes, spinach, basil, oregano, garlic, sliced olives and crumbled feta cheese. Bake for 10-12 minutes, or until cheese melts and crust is crisp.