Preheat the oven. Set it to 425°F (220°C).
If you have a pizza stone or sheet pan, place it in the oven to heat up. A hot surface helps crisp the crust.
Prep the crust. If using flatbread or a tortilla: Brush lightly with oil on both sides.
If making the Greek yogurt crust: Mix the yogurt and flour until a dough forms. Knead briefly on a floured surface, then press or roll into an 8–9 inch circle.
Brush lightly with oil.
Par-bake the crust. Bake the crust on the hot pan for 4–6 minutes until it firms up and edges start to color. This keeps it from getting soggy later.
Cook the toppings. Warm a skillet with a little oil. Sauté garlic and veggies 2–3 minutes until just tender.
Add cooked turkey sausage to heat through. Season with salt and pepper.
Make the egg mixture. Whisk eggs with Greek yogurt or cottage cheese until smooth. Season well with salt, pepper, and optional red pepper flakes. The yogurt makes it creamy and boosts protein.
Assemble. Remove the crust from the oven.
Sprinkle half the cheese on the crust. Pour the egg mixture evenly over the top, staying within the edges. Scatter the sausage and veggies.
Finish with the remaining cheese.
Bake. Return to the oven for 8–12 minutes, until the eggs are set and the cheese is melted and lightly golden. The center should be just firm, not jiggly.
Finish and serve. Let it rest 2 minutes, then top with chopped chives or parsley. Slice and serve hot.
Add a drizzle of hot sauce if you like.