Preheat the oven to 375°F.

In an oven-safe skillet, stir together grape tomatoes, olive oil, and salt. Roast in the oven for 15 minutes.

While the tomatoes roast, cook the pasta according to package directions. Drain and set aside.

After 15 minutes, remove tomatoes from the oven and place on the burner. Add onions and garlic and stir to cook. Press the tomatoes with a spoon while you cook until all tomatoes are smashed.

Add the cooked pasta into the skillet and stir to coat. Season with additional salt and pepper as needed and garnish with basil.