Step 1

Finely grate 2 ounces Parmesan cheese (about 1 cup). Mince 2 cloves garlic and slice 1 pound cremini mushrooms 1/4-inch thick.

Step 2

Heat 2 tablespoons olive oil in a large Dutch oven or pot over medium-high heat until shimmering. Add the mushrooms, 1 1/2 teaspoons kosher salt, and 1/4 teaspoon black pepper, and cook, stirring occasionally, until the mushrooms are browned and tender, 5 to 8 minutes. Add the garlic and 1 pound dried orzo pasta (about 2 1/2 cups) and sauté until fragrant, about 1 minute.

Step 3

Stir in 2 cups chicken or vegetable broth and 2 cups whole milk and bring to a boil. Reduce the heat to maintain a simmer. Cook uncovered, stirring frequently to keep the orzo from sticking, until the orzo is al dente and most of the liquid is absorbed and has formed a creamy sauce, about 10 minutes or according to package instructions.

Step 4

Remove from the heat. Add 4 cups packed baby spinach and the Parmesan and stir until the spinach is just wilted and the cheese is melted, about 1 minute. Serve garnished with more grated Parmesan cheese.