Preheat your broiler to low. Place tomatoes on a baking sheet, coat in olive oil, and season with salt and pepper. Place tomatoes on the middle rack, not too close to the broiler. Broil for ten minutes. Flip tomatoes and then broil for ten more minutes.

While the tomatoes are cooking, make the pasta according to the instructions on the packaging. Drain noodles and set off to the side.

In a large bowl, toss the spaghetti together with the tomatoes, lemon zest, and lemon juice, and the oil they were cooked in. Break a few tomatoes for extra flavor in the sauce. Portion out two large or four small servings of pasta and top each with a dollop of ricotta, crushed red pepper flakes, and basil.