Preheat the oven to 400 degrees F.
Heat 1 tablespoon olive oil in a large oven-safe skillet set over medium-high heat. When the oil is hot, add the sausage or chicken. Sear on all sides until golden, about 3-5 minutes per side. Remove the sausage or chicken from the skillet.
To the same skillet, add the butter and shallots, cooking 3 minutes.
Add garlic and orzo, toasting until lightly golden, 2-3 minutes.
Add the wine and deglaze the pan.
Add 1 1/2 cups water.
Bring to a boil, cook 3-5 minutes, then add the cream, chicken broth, mustard, parmesan sun-dried tomatoes and broccolini. Slide the sausage or chicken with any juices back into the skillet.
Transfer to the oven and cook, uncovered for 10-15 minutes, until the sausage/chicken is cooked through.