Place the peas in the sieve and cook them in the water until they’re warmed throughout, about 1 to 2 minutes if fresh, or 2 to 3 minutes if frozen. Set the peas aside.
Before draining the pasta, scoop out about ½ cup of the pasta cooking water with a heat-safe measuring cup. Drain the pasta, then return it to the pot. Pour in the green sauce, about ¾ of the Parmesan and the peas, and add a small splash of the reserved cooking water (not the end of the world if you forgot it). Stir gently until the pasta is well coated and bright green, adding another splash or two of pasta water to loosen the sauce and make it almost creamy.
Even if you don’t typically love eggplant or summer squash, I bet you’ll enjoy this ratatouille.
It’s vegan and gluten free for all to enjoy. Just choose your accompaniments accordingly.
Ratatouille is a great make-ahead recipe. It tastes even better the next day and reheats beautifully. (You can also freeze extra ratatouille for later.)