Farfalle Bake with Butternut Squash, Prosciutto, Rosemary and Mozzarella Cheese Farfalle Bake Ingredients 2 tsp. olive oil 1 medium red onion, chopped 2 Tbsp. fresh rosemary, chopped 8 slices prosciutto, torn into bite-sized pieces 4 cups butternut squash, peeled and cubed 1 box (16 oz.) farfalle (bowtie) pasta 2 Tbsp. butter 2 Tbsp. flour 2