For the pasta
01 -
2 tablespoons (28 g) unsalted butter
02 -
1 small yellow onion, finely diced
03 -
3 cloves garlic, minced
04 -
1 teaspoon dry mustard powder
05 -
1/2 teaspoon kosher salt, plus more to taste
06 -
1/4 teaspoon black pepper
07 -
12 oz (340 g) small shell pasta
08 -
3 cups (720 ml) low-sodium vegetable broth
09 -
1 1/2 cups (360 ml) whole milk
10 -
1/2 cup (120 ml) water, plus more as needed
11 -
4 cups (280 g) small fresh broccoli florets and peeled chopped stems
For finishing
12 -
2 cups (225 g) freshly shredded sharp cheddar cheese
13 -
1/4 cup (25 g) finely grated parmesan cheese
14 -
1 teaspoon lemon juice, optional
15 -
Extra black pepper, for serving