Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the Greek yogurt and eggs until fully combined.
1.5 cups Plain 2% Greek yogurt
In another bowl, mix the flour, flaxseed, baking powder, garlic powder, red pepper flakes, and salt until well blended.
1.5 cups Plain 2% Greek yogurt
Combine the wet and dry ingredients gently until just mixed, then fold in the chopped spinach, chives, diced ham, and 0.5 cup of shredded cheese.
1.5 cups Plain 2% Greek yogurt
Scoop the dough into 12 equal portions and shape them into biscuits, placing them onto the prepared baking sheet. Top each biscuit with the remaining shredded cheese.
Bake in the preheated oven for 20 to 25 minutes or until golden brown on top and firm to the touch.