1 tbsp olive oil
1–2 tbsp butter
1 lb Italian sausage (mild or spicy), casings removed and crumbled
2 shallots (~1 cup), finely diced (or substitute yellow onion)
Salt and pepper, to taste
1 tsp oregano (optional)
1–2 tsp Calabrian chili paste (I used a full tbsp)
4–6 garlic cloves, minced (to taste)
6 tbsp tomato paste
⅓ cup vodka
4½ cups low-sodium chicken broth
1 lb shellbow pasta @delallofoods
½–¾ cup heavy cream (depending on desired creaminess)
1 cup frozen peas (optional)
1 cup freshly grated parmesan, plus more for serving