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.
I baked a tuna casserole last night.
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.
hetergeneous
can you use chicken in stead of tuna in tuna helper
A flower is a heterogeneous mixture.
Heterogeneous mixture.
Sand+salt: a heterogeneous mixture.
heterogeneous mixture
The noun casserole is a countable noun. Example: We have two casseroles, one tuna casserole and one chicken casserole.
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.
Heterogenous