In a mixing bowl, combine the cottage cheese, olive oil, and egg. Blend until smooth and creamy, resembling a thick batter. This should take about 2-3 minutes.

In a separate bowl, whisk together the all-purpose flour, baking powder, and salt until well combined, about 1-2 minutes.

Gradually add the dry mixture to the wet mixture, folding them gently together with a spatula until just incorporated, about 1-2 minutes.

Gently fold in the finely chopped baby spinach and shredded mozzarella cheese into the dough, mixing for about 1-2 minutes.

Scoop out portions of the dough and shape them into bagel-like circles with a small hole in the center, about 5 minutes.

Preheat your oven to 400°F (200°C). Arrange your shaped flagels on a lined baking sheet and bake for about 15 minutes until golden brown.

Once baked, remove the flagels and allow them to cool on a wire rack for about 5-10 minutes before serving.