Prepare pasta in a large pot according to packet instructions. Save 1 cup of pasta water for later.
6 oz pasta
While the pasta is boiling, heat olive oil in a large pan on medium-high heat.
1 tablespoon olive oil
Add sliced onions and gently saute for about 3 minutes until translucent and fragrant.
1 medium-sized red onion
Next, add garlic & tomatoes and fry for another 5 minutes.
4 cloves garlic, 1,5 cups cherry tomatoes
Add spinach and fry for 2 minutes until wilted.
3 cups fresh baby spinach
Finally, add vinaigrette & pasta water (to taste).
Add pasta & toss to coat. Add more pasta water if desired & stir again.
To serve, sprinkle with the remaining spinach, fresh basil, and cheese (if desired).
½ cup fresh spinach, feta or parmesan, fresh basil