We dug deep in our archives to find these cheesy shells that many community members return to again and again for a quick weeknight meal. This time around we're using rotisserie chicken, which saves time and adds flavor.
Garlic / Broccoli / Cheese - Prep as directed. Store separately. (Can be done up to 5 days ahead)
Rotisserie chicken - (Chop chicken for Thursday night at the same time.) Take meat off the bone and chop with a knife. (Can be done up to 3 days ahead)
Make sauce base - Mix garlic with milk, mustard, nutmeg, salt, and flour.
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Bring a large stock pot (stock pot should accommodate pasta and broccoli) of water to boil. Salt generously and add pasta. Cook until al dente, tender but not soggy. Add broccoli in the last 1 1/2 minutes of cooking.
When pasta is done, reserve 1 cup / 235 ml (for 4 servings; adjust if customizing) of pasta water and drain pasta and broccoli.
Heat a saute pan over medium heat. Add oil and then chicken (reserve half if doubled for Thursday) to heated oil. Saute until chicken is heated through, ~1 minute.
Pour sauce base over chicken. Whisk sauce base and, once it starts to thicken, add in pasta and broccoli.
If the sauce is too thick, pour in some of your reserved pasta water. Keep on adding the pasta water until you get the consistency you want.
Remove pan from heat and stir in cheese until melted.