My grandma’s spaghetti. Oh man. The best that I’ve ever tasted or had.
My neighbor’s pecan pie. She makes it homemade. I swear she could open up a store chain if she wanted to and it would be quite a draw.
Feel free to post recipes if you know them. If not, that’s okay, you can still brag about your own or people you know’s meals/foodstuffs. 
My mum’s Bavarian apple torte, my dad’s chili, and my grandmother’s blueberry pie.
My dad makes baingan ka bartha (er…sauteed spicy eggplant with onions and stuff) which I could never match.
My aunt makes fried rice Indian-style to die for.
My now-deceased grandmother’s treacle cake and cookies. The recipe is in my mother’s hands now, and she does a darn good job.
My still-living grandmother’s fricot, croquettes, and rappe pie.
My own dumplings. 
My sister’s apple pie. The crust is the best that can be imagined: flaky, buttery, light, and perfectly browned.
Pretty much anything made by my one Grandma. Pies, jelly, jam, cabbage rolls… mmm. Actually, I’ve managed to near duplicate her cooking in some things, so I can still get them at least!
I can’t duplicate my Nana’s soups though. She makes this lovely cream of zuchinni soup… mmmm.
My Uncle’s apple/raisin stuffing.
My late mother’s homemade pies–in particular, huckleberry. Oh, man. I’d give anything to go back in time and eat homemade huckleberry pie with my mum one more time. (Sniff. It’s Mother’s Day.)
Coming in a very close second, mum’s homemade–pastry and all, and she was justifiably proud of her pastry–rhubarb, then apple pies.
Love ya, mum.
My mother’s pavlova recipe.
My grandmother’s pea soup, which she taught my mother to make. Mom could also make killer soups of other kinds. Neither of them is here anymore, so goodybe to amazing soup. Oh, and the apple and cherry and rhubarb pies, and butter tarts they used to make.
I played in a band 25 years ago with an Italian drummer, whose mother made what surely must be the world’s most incredible spaghetti. It was like no other spaghetti I’ve ever seen or tasted. It wasn’t pasta with sauce, it was flavor mixed into the pasta in the pot, served up without any red sauce on top. It was some of the best food I’ve ever put in my mouth.
My wife’s chicken parmigiana is to die for. We had company over tonight, and she made it for them. You guys wish you were at my house today! She does the chicken, and I make my special onion/garlic potatoes, the recipe for which I posted in a recent thread. Now there are two more people who will never turn down an invitation to have supper at our place.
My mother’s fried chicken, corned beef patties, banana bread, etc. We all have the recipes, but they don’t taste the same when we make it.
My grandfather’s pierogi. He made potato and cheese, and potato and sauerkraut. He doesn’t make them anymore, but I loved them. I need the recipe so I can try them for myself.
My dad’s ribs. My fiance agrees. He loves ribs and gets them a lot when we have dinner out. His comment (if they’re good) is always the same. “They’re good. But not as good as your dad’s.”
My mom’s cheesecake (the recipe for which she jealously guards). My wife’s ginger cookies (recipe posted on an earlier SDMB thread). My brother-in-law’s BBQ.
My brother’s pizza. Only he can make the crust right.
My dad’s pancakes - I miss Saturday morning breakfasts with my daddy…
My mom’s bacon - I could never cook bacon the way she did. Seems like it should be a simple thing, right? I can’t match her grilled cheeses either.
My mormor’s cookies. I really miss her…
Thanks, y’all - now I’m sad!
My mom’s-
Meatloaf- always less soggy than what you get at restaurants. I love it.
Mushroom burgers- based on the ‘ramp burgers’ served at Burgermaster in Great Falls Montana. Cream of mushroom soup with velveeta melted in it poured over a burger and bun.
Tuna (macaroni) salad- Just tuna, macaroni noodles, mircale whip, green onions and lemonpepper. Somehow when I make it at home it just doesn’t taste the same.
My wife’s Eggplant Parmesan, pasta salad, Stuffed Shells, Meatloaf…aw, hell. I love all of my wife’s cooking.
But I still make the best Peach Pie I’ve ever had.
My late grandmother’s strawberry shortcake. It was made in a bowl with layers of cooked piecrust and sweetened stawberries and it was so-o-o-o good. I’m afraid to attempt it, because if I get it right, I won’t be able to fit through the door!