Step 1

Caramelized Onions:

Step 1

Heat 1 tablespoon of olive oil and 1 tablespoon of butter in a large skillet over medium-low heat.

Step 2

Add the thinly sliced onions and a pinch of salt.

Step 3

Cook slowly, stirring occasionally, for 20-30 minutes, or until the onions are deeply golden brown and sweet. Set aside.

Step 4

Roasted Garlic:

Step 1

Preheat the oven to 400°F (200°C).

Step 2

Slice off the top of the garlic heads to expose the cloves.

Step 3

Drizzle with olive oil and wrap in foil.

Step 4

Roast for 30-40 minutes, or until the cloves are soft and golden brown.

Step 5

Let cool slightly, then squeeze the roasted garlic cloves out of their skins.

Step 6

Pasta:

Step 1

Cook the pasta until al dente. Reserve about ¼ cup of pasta water.

Step 2

Garlic Butter:

Step 1

In a medium bowl, mash the roasted garlic with the softened butter, caramelized onions, parsley, Parmesan cheese, salt, and pepper.

Step 2

Toasted Breadcrumbs:

Step 1

Heat a skillet over medium heat.

Step 2

Melt 1 tablespoon butter and add the breadcrumbs.

Step 3

Toast, stirring frequently, until golden brown and crispy (about 2-3 minutes).

Step 4

Assembly:

Step 1

In the same pot you cooked the pasta, add the garlic butter and the cooked pasta. Toss to coat.

Step 2

Add a splash of pasta water if needed.

Step 3

Top with the toasted breadcrumbs and extra Parmesan cheese.