Pasta Fresca

0 In a small bowl, whisk together sauce ingredients until blended.
1 Set aside.
2 Bring a large pot of salted water to a boil.
3 Add the pasta, stir, and cook pasta according to package instructions.
4 Drain and set aside.
5 While pasta is cooking heat 3 teaspoons of olive oil in a heavy skillet.
6 Add the diced garlic and saute about 1 minute. Don't let it scorch.
7 Stir in the tomatoes, onion, and pasta.
8 Continue to cook over medium heat, scraping the bottom of the pan often, for about 3 - 5 minutes, or until the penne pasta starts to caramelize and get a golden crust.
9 Stir in the balsamic mixture and the spinach.
10 Saute just until the spinach wilts.
11 Garnish with shaved Parmesan and serve.