Ingredients
3 tablespoons olive oil, divided
12 ounces boneless chicken breasts
coarse salt and fresh black pepper
8 ounces spaghetti
1 teaspoon chopped garlic
2 tablespoons all-purpose flour
1 cup whole milk
1 cup low-sodium chicken broth
1/2 cup Parmesan cheese, plus more for serving
4 packed cups fresh baby spinach leaves
3/4 cup plum tomatoes, diced
Preparation