Step 1

In a medium skillet, heat olive oil over medium heat. Add thinly sliced onions and pinch of salt. Cook onions for 30 minutes, or until onions are browned and caramelized.

Step 2

While the onions are cooking, pre-heat oven to 400F. Place cubed butternut squash on a baking sheet and toss with a teaspoon of olive oil and sprinkle with salt and pepper. Roast for 15 minutes, or until soft. Remove and set aside.

Step 3

When onions are caramelized, add broccolini and cremini mushrooms and sauteé for 5-10 minutes. Add garlic to the top and cook just until fragrant.

Step 4

Lightly flour your work surface and roll out pizza dough to a 1/8-inch thick circle. Transfer pizza dough to a piece of parchment. Add the tomato sauce to one half. Top with broccolini/mixture. Add the butternut squash and then finish it off with a few slices of mozzarella.

Step 5

Fold dough in half, over filling, and crimp as desired to seal. Transfer parchment with calzone to a baking sheet. Using a knife, slice a hole in the top. This will allow steam to escape as it bakes. Place it in the oven and cook until dough is puffed up and golden brown, 15-20 minutes.