In small bowl, combine salt, pepper, and paprika and set aside.
Grease 6 cups of a muffin tin.
In large bowl, beat eggs and yogurt together with half of spice mixture. The yogurt will be a bit lumpy at first; using a balloon whisk will help to smooth it out.
Combine remaining spice mixture with grated sweet potato and divide among the 6 greased muffin cups. Top grated sweet potato with small amount of chopped spinach and spring onion. Pour egg mixture into the muffin cups overtop these ingredients.
Bake at 350 F for 18 to 20 minutes.
Recipe Notes
Per serving: 130 calories; 10 g protein; 8 g total fat (2 g sat. fat); 5 g total carbohydrates (2 g sugars, 1 g fiber); 291 mg sodium