Add cooked mashed potatoes to a large bowl. Set aside. Heat olive oil in a non-stick skillet over medium heat. Add garlic and onion. Sautee for 5 minutes.
Add spinach and continue sautéing until spinach is wilted. Add spinach mixture to mashed potatoes. Stir to combine.
Thoroughly mix the remaining ingredients plus 1 cup of panko crumbs, placing the rest of the panko in a shallow dish.
Preheat oven to 350. Form potato mixture into small cakes, coat them in the panko, ad then transfer cakes to a nonstick baking sheet. Repeat with remaining mashed potato mixture.
Bake for 15-20 minutes, or until cakes are browned on top. Serve immediately.
Recipe by Mom to Mom Nutrition at https://momtomomnutrition.com/food-and-recipes/mashed-potato-cakes/