Created by lazyme on February 24, 2015
Step 1: Saute sausages in Dutch oven over high heat until brown, breaking into small pieces with back of spoon, about 12 minutes. Using slotted spoon, transfer sausage to bowl.
Step 2: Pour off all but 1 tablespoon drippings.
Step 3: Add onion and saute until light brown, about 6 minutes. Add cream; boil 5 minutes.
Step 4: Add broth; boil until reduced to sauce consistency, stirring occasionally, about 8 minutes. Return sausage to pot.
Step 5: Cook penne in large pot of boiling salted water until pasta is just tender but still firm to bite.
Step 6: Meanwhile, bring sauce to simmer over medium heat. Add peas and mascarpone and simmer until peas are tender, about 6 minutes.
Step 7: Drain pasta. Add to sauce; toss to coat. Mix in Parmesan.
Step 8: Season with salt and pepper.
Step 9: Transfer to large bowl; serve.