INGREDIENTS
•
½ cup onion, finely chopped
•
3 tablespoons olive oil
•
4 cloves garlic, finely chopped
•
1 pinch red pepper flakes
•
¼ cup white wine
•
28 ounces whole tomatoes with juice
•
2 cups chicken broth
•
2 tablespoons dried basil, or ¼ cup fresh basil leaves, torn
•
2 tablespoons sugar
•
2 tablespoons balsamic vinegar
•
5 ounces frozen spinach, thawed