|Macaroni shell||4 Ounce (1 1/4 Cups, Uncooked)|
|Condensed cream of mushroom soup||10 3⁄4 Ounce (1 Can)|
|Milk||1⁄2 Cup (8 tbs)|
|Canned tuna||7 Ounce, drained and flaked (1 Can)|
|Canned sliced mushrooms||4 Ounce, drained (3/4 Cup Or 1 Can)|
|Finely chopped onion||1⁄3 Cup (5.33 tbs)|
|Shredded cheddar cheese||1⁄2 Cup (8 tbs)|
|Sliced stuffed green olives||1⁄2 Cup (8 tbs)|
|Coarsely crushed corn chips||1⁄2 Cup (8 tbs)|
Cook macaroni according to package directions until al dente; drain.
Combine macaroni, soup and milk in 1 1/2-quart casserole.
Blend in tuna, mushrooms, onion, cheese and olives, if desired.
Cover; microwave on high (full power) for 7 to 8 minutes, or until hot and bubbly, stirring halfway through cooking time.
Let stand 5 minutes.
Sprinkle with corn chips before serving.