Cook the pasta according to the package instructions, but about 2-3 minutes before the pasta is done, add the broccoli florets to the pot. When the pasta is finished cooking and the broccoli is bright green, drain and set aside.

In a saucepan over medium-low heat, combine the butter, garlic, and as much of the crushed red pepper as you like. Cook until fragrant, about 1 minute.

Add the cooked pasta, broccoli, water, tomatoes, and pesto to the saucepan. Stir to combine and season with salt and pepper to taste. Cook until heated through, about 2-3 minutes, and serve.