Bucatini all’Amatriciana

Name: Bucatini all’Amatriciana
Prep time: 5 min
Cook time: 45 min
Total time: 50 min
Cuisine: Italian
Ingredients: 3 Tablespoons olive oil; 1 5 Ounce package pancetta (cubed); 1/2 Red onion (diced); 1 28 Ounce can whole plum tomatoes; 1 Tablespoon red wine vinegar; 3/4 Teaspoon red pepper flakes; Salt and pepper (to taste); 1 Pound bucatini; 1/4 Cup Pecorino Romano (grated, plus more for serving)