INGREDIENTS
1
red onion, sliced
4 cloves
garlic, finely chopped
1 tbsp
olive oil
5 cups
broccoli florets
8 oz
linguine
3 cups
reduced sodium vegetable broth
1/2 tsp
salt
1/4 tsp
freshly ground black pepper
1/8 tsp
red chili flakes
1/2 cup
whole milk
4 cups
raw spinach
1/3 cup
grated Parmesan, plus more to serve