Step 1

Heat the olive oil in a very large pot or Dutch oven. Add the the spinach in batches, stirring to wilt until all the spinach has been added. Cover the Dutch Oven and cook on medium-low, stirring every few minutes, until the spinach is soft, about 10 minutes. Add the balsamic and stir to combine. If the spinach starts to brown, reduce heat to low and continue to cook.

Step 2

While the spinach is cooking, melt the butter in a small skillet over medium-high heat. Add the panko bread crumbs and season with salt and freshly cracked black pepper. Stir and sauté until the bread crumbs are golden-brown, about 3 minutes. Stir in the lemon zest and remove from the heat.

Step 3

Add the cream cheese in small pieces into the spinach over low heat. Stir the cream cheese until it's melted into the spinach. Add the fontina, lemon juice and heavy cream and combine for about 1 minute until the fontina is melted. Transfer the spinach mixture to a serving bowl and sprinkle the toasted panko over the top to serve.