Great for a cold night!
Strain liquid from canned beans into blender.
Add 1 cup beans and puree until smooth.
Heat oil in large pot over medium heat.
Add sausages, rosemary, garlic, and crushed red pepper.
Sauté until sausages are cooked through, breaking up with fork, about 8 minutes.
Mix in tomato paste.
Add bean puree, remaining beans, broth, and pasta.
Simmer until pasta is tender and mixture is thick, stirring occasionally, about 30 minutes.
Mix in 1/4 cup cheese.
Season with salt and pepper.
Serve, passing remaining 1 1/4 cups cheese.
