20-ounces refrigerated mushroom ravioli
1 tablespoon plus 1/2 teaspoon salt, divided
1/8 teaspoon black pepper
1 cup California walnuts plus 1/4 cup for garnish
1 clove garlic
1/3 cup half and half
1/4 cup olive oil
1 teaspoon fresh thyme leaves
1/2 cup grated parmesan cheese plus 2 tablespoons for garnish
In a Dutch oven or large pot, bring 4 quarts water and 1 tablespoon salt to boil. Add ravioli and cook according to package directions, about 4 to 5 minutes.
In a blender or food processor, combine walnuts and garlic and pulse until coarsely chopped, about 5 pulses.
Add heavy cream, olive oil and thyme and process to a coarse paste (the sauce will not be smooth). Transfer to a small bowl and stir in cheese. Season with salt and pepper. Set aside.
Using a skimmer, transfer ravioli to paper towels to drain (do not drain pasta cooking water).
Add 4 to 6 tablespoons hot pasta water to walnut sauce and stir to thin.
Add walnut sauce to a skillet and cook on medium heat until warmed through, about 5 minutes.
Arrange ravioli in a large serving bowl or individual plates. Top with sauce and garnish with walnuts, fresh thyme, and more parmesan cheese.