Mix warm water and yeast in a bowl. Let sit 5–10 minutes until foamy.
Whisk flour, salt, and garlic powder in a bowl. Add yeast mixture and olive oil. Stir until a shaggy dough forms.
Knead on a floured surface for 8–10 minutes until smooth and elastic. Add flour if sticky.
Place in an oiled bowl, cover, and let rise in a warm spot for 1 hour or until doubled.
Combine mozzarella and half the chopped parsley. Set aside.
Divide dough into 12 pieces. Roll into ropes, flatten, add cheese, seal, and tie into knots.
Place knots on a lined baking sheet. Cover and let rest 20 minutes.
Bake at 400°F for 14–16 minutes until golden and cheese starts to ooze.
Brush with olive oil and top with remaining parsley. Serve warm.