01 -
Set your oven to 400°F (200°C) and let it get hot.
02 -
Fill a big pot with water (4 quarts) and bring it to a boil. Throw in a tablespoon of salt. Cook the egg noodles just until they're firm (around 2 mins shorter than package says). Toss the chopped broccoli in and let them cook for another couple of minutes. Afterward, drain them all together.
03 -
As the noodles go, use a dry skillet on medium-high heat for the sliced mushrooms (no oil required). Cook them until their juices come out and they start getting a bit golden, around 5-10 minutes. Set them aside when done.
04 -
In a large pan safe for the oven, melt butter on a medium setting. Add in the onion pieces and cook them, stirring now and then, until soft and see-through. This'll take about 5 minutes.
05 -
Put the drained pasta and broccoli back in the pot. Stir in the cooked mushrooms, tuna, cheddar, soup, milk, and cream. Shake in a bit of salt and pepper for extra flavor. Give it all a careful stir so it blends nicely.
06 -
If your mix isn’t already in an oven-safe pan, transfer it to a 9x13 inch dish. Spread the crushed chips all over the top evenly.
07 -
Bake for around 20 minutes. You’re looking for golden topping and bubbling edges.