8 oz. hollow pasta, preferably elbow macaroni
3 tbsp. unsalted butter
¼ cup flour
3 cups milk
1¾ cup goat cheese
2 cups baby spinach
Kosher salt and freshly ground black pepper, to taste
4 plum tomatoes, thinly sliced
1. Heat oven to 375°. Bring a 4-qt. saucepan of lightly salted water to a boil. Add pasta and cook, stirring occasionally, until cooked halfway through, about 3 minutes.
2. Melt butter in a 4-qt. saucepan set over medium heat. Add flour and stir until mixture thickens, 1 minute. Whisk in milk and cook, continuing to whisk often, until sauce has thickened and coats the back of a spoon, about 10 minutes. Remove pan from heat. Stir in 1½ cups goat cheese and spinach; add pasta and season with salt and pepper. Transfer mixture to an 8” x 8” baking dish. Layer tomato slices on top of pasta and sprinkle remaining goat cheese on top.
3. Transfer baking dish to a baking sheet and bake until macaroni and cheese is golden brown and bubbly, 45 minutes. Let cool for 10 minutes before serving.