Heat oven to broil on high.
In a large sauté pan over medium heat, add the olive oil and heat through. Add the garlic then the rapini. Sauté the rapini until wilted and tender, about 3 minutes. Set aside.
Cut the loaf of ciabatta in half lengthwise and then again widthwise so you have two buns for your sandwiches.
Evenly spread the calabrian chili paste over each of the bottom halves of the sandwiches.
Top each with 1 cup of the Bolognese followed by a handful of sautéed rapini and torn pieces of burrata.
Arrange on an aluminum foil-lined baking sheet. Add the top half of the bread to the baking sheet as well.
Broil until the burrata is melted and the bread is golden brown, about 1 to 2 minutes. Close and serve hot.
