Bucatini all' Amatriciana (Spicy Italian Pasta) - Chili Pepper Madness

Ingredients

• 2 tablespoons olive oil
• 4 ounces guanciale (chopped (sub in hot soppressata, pancetta, or bacon))
• 1 small onion (chopped)
• 2 Calabrian peppers (chopped (for extra heat and spiciness))
• 4 cloves garlic
• 28 ounce can peeled tomatoes
• 1 teaspoon spicy red pepper flakes (or more to taste)
• Salt and black pepper to taste
• 12 ounces bucatini noodles (prepared to al dente)
• For Serving: Extra crushed red pepper, fresh chopped parsley, grated Parmesan or pecorino cheese