Preheat oven to 400 degrees Fahrenheit.

Add grape tomatoes and garlic to a 3-quart baking dish. Toss with olive oil and a few pinches of salt and pepper. Place feta in the center of tomatoes, turn to coat with oil.

Bake in the oven for 30 minutes.

Raise oven rack to the upper third of the oven, increase temperature to 450 degrees, and bake until tomatoes and feta are slightly browned, about 10 minutes.

Meanwhile, cook pasta to al dente in salted water according to package instructions.

Reserve 1/2 cup of pasta water. Drain pasta and spinach. Mix spinach into the pasta while it’s still hot to wilt it.

Squeeze the roasted feta and tomatoes into a bowl; mash together with a spoon. Add the mixture to the cooked pasta along with basil, parsley, and red pepper flakes.

Thin out the sauce with reserved pasta water, a tablespoon at a time, until reaching desired consistency. Season with salt and pepper if needed. Serve warm.