Prep time: 15 minutes. Cook time: approximately 20 minutes, depending on batch size. Total time: approximately 35 minutes. Yield: 8 to 10 medium patties. Servings: approximately 4 to 5; nutrition estimates assume 5 servings of 2 patties each. Ingredients: 2 medium potatoes peeled and grated, 1 medium grated carrot, 1 cup finely chopped fresh spinach, 2 large beaten eggs, 1/2 cup plain breadcrumbs plus up to 2 additional tablespoons if needed, 1 cup shredded low-moisture mozzarella divided, 2 minced garlic cloves, 1/2 teaspoon salt, 1/4 teaspoon black pepper, 1/2 teaspoon paprika, optional 2 tablespoons chopped fresh parsley, and approximately 3 tablespoons olive oil or neutral cooking oil for pan-frying. Peel and grate potatoes. Place in a clean kitchen towel and squeeze firmly to remove excess liquid. Grate carrot, finely chop spinach, and mince garlic. Mix potatoes, carrot, spinach, garlic, beaten eggs, breadcrumbs, salt, pepper, paprika, and optional parsley. Stir in 3/4 cup mozzarella, reserving 1/4 cup for stuffing. Divide mixture into 8 to 10 portions, flatten each, place a small pinch of reserved mozzarella in the center, and seal vegetable mixture around the cheese. Shape into patties approximately 1/2 inch thick. If mixture feels loose, add up to 2 tablespoons additional breadcrumbs, one tablespoon at a time. Heat approximately 2 tablespoons oil in a large skillet over medium heat. Cook patties in batches for approximately 3 to 5 minutes per side until golden brown and cooked through, reaching at least 160°F (71°C) in the center. Add remaining cooking oil as needed. Drain briefly on a wire rack or paper towel-lined plate. Rest for about 2 minutes and serve warm with garlic yogurt sauce, sour cream, tzatziki, or another dipping sauce. Dipping sauces are not included in nutrition estimates. For an oven-baked variation, brush patties with oil and bake at 400°F (200°C) for approximately 20 to 25 minutes, flipping halfway through and verifying an internal temperature of at least 160°F (71°C). Optional variations include cheddar or Monterey Jack instead of mozzarella, fresh dill, chives, smoked paprika, crushed red pepper, or squeezed grated zucchini. These variations are not included in nutrition estimates. Refrigerate cooked leftovers promptly in airtight containers at 40°F (4°C) or colder for 3 to 4 days. Reheat thoroughly to 165°F (74°C). Freeze cooked patties for up to 2 months for best quality. Nutrition values are estimates based on 5 servings, approximately 2 patties per serving, and depend on potato size, mozzarella brand, oil absorption, and portion size.