Ingredients

• 2 pounds plum or Roma tomatoes, halved
• Salt and pepper
• 1/2 cup olive oil
• 2 tablespoons butter
• 1 pound spinach, stems removed
• 1 large egg, lightly beaten
• 2 large or 3 medium Idaho potatoes, boiled and mashed
• 1/4 teaspoon finely grated lemon zest
• cup dried bread crumbs
• 1 cup all-purpose flour
• 1/4 cup canola oil
• Fresh mozzarella (optional)

Instructions

1. Preheat oven to 400°F.
2. Arrange the tomatoes in a single layer on a rimmed baking sheet; sprinkle with the salt and pepper, and coat well with the olive oil. Roast for 35 minutes, or until the skins blister. Cool and purée; set aside.
3. Heat a large skillet over medium-high heat. Add the butter, melt, then add the spinach and cook, stirring, until wilted. Transfer to a cutting board and let cool. Squeeze the spinach dry and finely chop; place in a large bowl. Add the egg and stir until well combined. Add the mashed potatoes, Parmesan, and lemon zest, and season with more salt and pepper; stir until well combined. Stir in the bread crumbs, 1/4 cup at a time, until the mixture holds together. Pat into 2-inch by 1/2-inch-thick cakes. Dredge in the flour, patting off any excess.
4. Heat the canola oil in a large skillet over medium-high heat until hot but not smoking. Add the cakes and cook until lightly browned, 3 to 5 minutes per side.
5. Arrange the cakes over the roasted tomato sauce. Top with mozzarella, if desired.