Heat 1 tbsp olive oil in pan over medium heat. Cook diced pancetta 8-10 minutes until browned. Remove pancetta and set aside, leaving oil in pan.
Add shrimp to pan, season with salt and pepper and cook 2-3 minutes each side. Remove shrimp and set aside.
In separate large heavy-bottom pan, heat 2 tbsp olive oil and 1 tbsp butter over medium heat. Add chopped onion and salt and pepper to taste. Cook 5 minutes until soft.
Add red pepper and minced garlic, cook 3 minutes until fragrant.
Add pureed tomatoes and vodka to pan. Simmer 10 minutes.
Add heavy cream and parmesan, simmer 5 minutes until thickened.
Add parsley, pancetta and peas and keep warm.
Cook pasta to al dente in salted water according to package instructions.
Toss pasta in sauce and serve with shrimp. Garnish with additional parmesan and parsley.