01 - Preheat oven to 425°F and line a baking sheet with parchment paper.
02 - Place flatbreads on the prepared baking sheet.
03 - Whisk together olive oil and minced garlic in a small bowl until combined.
04 - Brush the garlic mixture evenly over each flatbread.
05 - Distribute shredded mozzarella cheese evenly across both flatbreads.
06 - Arrange chopped spinach and red onion slices over the cheese.
07 - Scatter crumbled feta cheese on top and sprinkle with dried oregano and black pepper.
08 - Bake for 12-15 minutes until cheese is melted and flatbread edges are golden and crisp.
09 - Remove from oven, slice into pieces, and serve immediately.