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1
Preheat oven to 400 degrees F (200 degrees C).
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2
Place spinach in a microwave safe bowl with a splash of water. Cover, and microwave until the spinach has wilted, about 5 minutes. Drain and allow to cool.
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3
In a large bowl, mix together beef, pork, eggs, bread crumbs, and Romano cheese. Season with salt and pepper. Divide into two equal portions, and roll each into balls.
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4
Place a 15-inch long piece of plastic wrap on your work surface and lightly sprinkle with flour. Place one of the balls onto the plastic wrap and pat into a thin, 8-inch by 10-inch rectangle. Cover evenly with half of the spinach and 3 slices of prosciutto, then shingle three slices of provolone running along the edge facing you.
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5
Using the plastic wrap to lift the meat, roll the loaf starting from the cheese side into a firmly packed spiral, peeling away the plastic wrap as you go. Make a second loaf with remaining ingredients.
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6
To bake, pour wine into a broiler pan bottom. Oil the slotted top with some of the olive oil before placing the loaves on and brushing them with remaining oil. Cover loaves with a sheet of aluminum foil and bake in preheated oven for 40 minutes.
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7
Remove the foil and pour water into the pan. Continue baking for another 35 minutes, until the internal temperature reaches 160 degrees F (72 degrees C). Allow to rest 10 minutes before slicing into 1-inch thick slices to serve.
