Bucatini all’Amatriciana Recipe

Ingredients

• 1 tablespoon extra virgin olive oil
• 1 medium onion, sliced thin
• 3 cloves garlic, sliced
• 1/4 pound guanciale, in 1-inch slivers 1/4 -inch thick
• 3 cups canned San Marzano tomatoes (about a 28-ounce can)
• 1/2 teaspoon red chile flakes, or to taste
• Salt
• 1/4 cup grated aged pecorino cheese, more for serving
• 1 pound bucatini