Yes
No, casserole is not a pure substance. It is a mixture of various ingredients such as meats, vegetables, sauces, and seasonings combined together to create a dish.
If you are looking for a really good recipe online for tuna casserole, look no further than recipe (dot) com. This site is loaded with different recipes submitted by the user base.
I baked a tuna casserole last night.
can you use chicken in stead of tuna in tuna helper
hetergeneous
A flower is a heterogeneous mixture.
Heterogeneous mixture.
Sand+salt: a heterogeneous mixture.
The noun casserole is a countable noun. Example: We have two casseroles, one tuna casserole and one chicken casserole.
heterogeneous mixture
There are many different versions of tuna casserole but these are the main ingredients: tuna, cheese crackers, noodles, peas, and Parmesan cheese. You can, of course, switch this up anyway you like to get the desired taste.
A good book to find a tuna casserole recipe would be "Mac and Cheese: 80 Classic and Creative Versions of the Ultimate Comfort Food". The author of the book is Ellen Brown and it includes a tuna casserole recipe.