Turn on broiler and spray a 1.5-2 quart casserole dish with cooking spray and set aside.
Bring chicken broth to a boil in a medium-large pot. Cook noodles in chicken broth according to package's instructions and al dente. Note: Do not drain the broth. The remaining broth serves as a nice base for the mushroom sauce.
Combine cooked spaghetti with cream of mushroom soup, peas, tuna seasoning and cheese. Cook on low-medium heat for 2-3 minutes or until warmed throughout. Move combined ingredients to casserole dish.
Combine melted butter and crushed crackers, spread evenly on top of casserole and broil for 3-5 minutes until browned.
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Notes
Use any pasta you'd like. Just be sure to break up larger pastas for easier eating.
Don't overcook pasta. Boil pasta al dente to prevent it from getting mushy.
Make sure there is enough broth to cover the pasta. Feel free to add more as needed. And there is no need to drain the pasta once done cooking. The remaining broth serves as a nice base for the mushroom sauce.
Adjust seasoning as desired. We recommend starting small and tasting along the way!
Keep an eye on the casserole under the broiler to make sure it doesn't burn.