Step 1

Preheat oven to 400 degrees. Spray a 9 x 13 inch with nonstick spray and set aside.

Step 2

In a large skillet heat the olive oil a medium heat. Once hot, add the cauliflower and mushrooms. Cook, stirring often, until the cauliflower is soft and mushrooms have released their water. About 6 to 8 minutes. Stir in the spinach, artichoke, garlic, salt, pepper, and thyme. Cook until the spinach is wilted, about 3 minutes.

Step 3

Add the milk and bring to a simmer, once simmering stir in the mozzarella and cheddar cheese. Stir, constantly, until melted. Pour the mixture into the prepared casserole dish.

Step 4

In a small bowl combine the parmesan and panko. Sprinkle over the spinach mixture. Place in the oven and bake for 15 to 20 minutes or until golden brown. After removing from the oven let sit for 10 minutes before serving.