For the mushrooms
01 -
1 1/2 lb (680 g) cremini mushrooms, wiped clean and sliced 1/3 inch thick
02 -
1 tablespoon olive oil
03 -
1/2 teaspoon kosher salt, plus more to taste
04 -
1/4 teaspoon black pepper
For the cowboy butter
05 -
6 tablespoons (85 g) unsalted butter
06 -
4 cloves garlic, minced
07 -
1 teaspoon Dijon mustard
08 -
1 teaspoon fresh lemon juice, plus more to taste
09 -
1/2 teaspoon smoked paprika
10 -
1/8 teaspoon cayenne pepper, or more to taste
11 -
2 tablespoons chopped fresh parsley
12 -
1 tablespoon chopped fresh chives