Breadcrumbs:

• 1 tablespoon virgin olive oil
• 1/4 cup panko breadcrumbs
  

Pasta:

• 12 oz dried pasta, any shape
• 1/3 cup extra virgin olive oil
• 1/2 large yellow onion, finely chopped 
• 4 large cloves garlic, finely diced
• 8 anchovies, kept whole (or more if you're into it - sometimes I do 10-12, or even a whole jar for a super intense flavor)
• 2 tablespoons tomato paste
• 2 tablespoons Calabrian chili paste, divided  (1T for cooking, 1T for finishing)
• 1 cup pasta cooking water, plus more for loosening up the sauce if desired
• 2 tablespoons salted butter, plus more for finishing if desired
• Roughly chopped fresh parsley or oregano for serving

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Crisp the breadcrumbs

1. To large heavy bottomed skillet, heat 1 tablespoon olive oil over medium. Add panko breadcrumbs, season with kosher salt, and stir to combine. Cook for around 5 minutes or until golden brown, stirring frequently. Remove breadcrumbs from skillet and transfer to small bowl—you’ll top your pasta with this later. Wipe your skillet clean.

Boil the water + make the sauce

1. Bring large pot of generously salted water to a boil.
2. In same skillet used for breadcrumbs, heat 1/3 cup olive oil over medium-low heat. Add onion and anchovies, stir to combine, and season with kosher salt. Cook for about 8-10 minutes, until onions have softened and anchovies have almost completely melted. Add garlic and saute until fragrant, about a minute or so.
3. Add tomato paste and 1 tbsp of Calabrian chili paste, and give everything a big stir to combine. Cook for 1-2 minutes, until the whole mixture starts to caramelize. Season as needed with kosher salt.

Cook the pasta + toss into sauce for serving

1. Cook the pasta just shy of al dente, it'll finish cooking in the sauce. Before you drain the pasta, set aside 1 1/2 cups of the pasta cooking water, as you'll use this to loosen up the sauce.
2. Transfer the cooked pasta to your sauce in the skillet over medium heat. Add 1 cup of pasta cooking water, the other tablespoon of Calabrian chili paste, and 2 tablespoons salted butter, and toss until combined.
3. Add more pasta water as needed to loosen up the sauce, being sure to season and taste as you go. Add few more knobs of butter if desired - it will add richness, cut the spice if needed, and to make an extra glossy sauce.
4. Transfer to bowls and top with generous amounts of fresh herbs and your previously made crispy breadcrumbs.