Step 1

Cook your macaroni noodles according to package directions until al dente.

Step 2

Just before draining the water, stir in the frozen peas. Then dump the contents into a colander and rinse under cold water.

Step 3

Return the empty pot to the stove over medium heat.

Step 4

Add butter and onions to the pot.

Step 5

Cook the butter until melted and the onions are soft.

Step 6

Add in the tuna and stir to break up the chunks.

Step 7

Mix in the milk, cream of mushroom soup, and cheese packets until well mixed.

Step 8

Stir the noodles and peas.

Step 9

Pour the cheesy noodles into a greased 1 1/2 quart or quart casserole dish.

Step 10

Sprinkle crushed Ritz crackers over the top.

Step 11

Bake in the oven at 350 degrees F for 10 minutes.