Preparation

• Position a rack in the center of the oven and heat the oven to 425°F. Bring a large pot of well-salted water to a boil. Lightly coat a 2-quart baking dish with oil.
• Heat 2 Tbs. oil in a 12-inch skillet over medium-high heat until shimmering. Add the shrimp, sprinkle with 1/2 tsp. each salt and pepper, and cook, stirring, until the shrimp start to lose their raw color (but don’t cook through), about 2 minutes. Add the garlic and cook, stirring, for 30 seconds. Stir in the spinach and cook, tossing, until it starts to wilt, about 1 minute. Remove from the heat.
• Add the pasta to the boiling water and cook according to the package instructions until al dente. Drain well and toss with the shrimp mixture, feta, 2 Tbs. oil, half the thyme, and lemon zest. Transfer to the prepared baking dish. In a small bowl, toss the breadcrumbs with the remaining Tbs. oil, the remaining tsp. thyme, and 1/4 tsp. salt. Sprinkle on top of the pasta.
• Bake the pasta until the breadcrumbs brown and the pasta heats through, about 20 minutes (cover with foil if the top browns too quickly). Let cool for a couple of minutes and then serve.