Ratatouille Pappardelle

1/4 cup extra-virgin olive oil
1 large onion, chopped
1 1/2 cloves garlic, minced
1 pound tomatoes, cut into 1/2-inch pieces
1 eggplant, cut into 1/2-inch pieces
3 zucchini, cut into 1/2-inch pieces
1 red bell pepper, cut into 1/2-inch pieces
1/4 cup tomato sauce
1 1/2 tablespoons herbes de Provence
salt and cracked black pepper to taste
1/4 cup dry red wine

Pasta:
1 (8 ounce) package dried pappardelle pasta
2 tablespoons extra-virgin olive oil
4 cups fresh spinach
2 ounces Parmigiano-Reggiano cheese, shaved
2 teaspoons balsamic vinegar, or to taste (optional)

Pour olive oil into a large pot over high heat.
Add onion and garlic and saute for 2 minutes.
Reduce heat and add tomatoes, eggplant, zucchini, bell pepper, tomato sauce, herbes de Provence, salt, and pepper.
Stir in wine, cover, and simmer for 10 minutes.
Uncover and simmer until vegetables are just tender, 12 to 15 minutes.
Leave ratatouille warm in the pot until ready to use.
Fill a large pot with lightly salted water and bring to a rolling boil.
Cook pasta at a boil until tender yet firm to the bite, about 10 minutes.
Drain, reserving 1/2 cup cooking water and toss pasta with oil.
Reheat ratatouille in an extra-large skillet over medium heat.
Add pasta and spinach; toss just until spinach wilts.
Add enough reserved pasta water to make a saucy consistency. Season with salt and pepper.
Sprinkle with Parmigiano-Reggiano cheese and drizzle with balsamic vinegar.