Sauté Onions and Garlic: Start by heating 1 tablespoon of olive oil in a skillet over medium heat. Add the diced onions and sauté until they become translucent, which should take about 5 minutes. Once they are soft, stir in the minced garlic and cook for an additional 30 seconds until fragrant. Remove from heat and let cool slightly before adding to the mixture.
Combine Ingredients: In a large mixing bowl, combine the sautéed onions and garlic with chopped spinach, ground chicken, breadcrumbs, Greek yogurt, dill, lemon juice, oregano, paprika, cumin, salt, and pepper. Use your hands or a spatula to mix everything together until well incorporated but be careful not to overmix as this can make the patties tough.
Shape Patties: With your hands lightly greased with olive oil (to prevent sticking), divide the mixture into equal portions and shape them into patties about ½ inch thick. You should yield approximately eight patties from this mixture depending on how large you make them.
Cook Patties: Heat another 2 tablespoons of olive oil in your skillet over medium heat until shimmering but not smoking. Place each patty carefully in the skillet without overcrowding them; if necessary, cook in batches. Fry each side for about 5-6 minutes until they turn golden brown and are cooked through.
Serve Warm: After cooking, place the patties on paper towels to drain any excess oil before serving warm. These versatile patties can be enjoyed alone or accompanied by various dipping sauces or garnishes such as tzatziki sauce or fresh vegetables for an extra touch of flavor!