I ask because I attempted a recipe for vegan "meatballs" today. The base was uncooked red lentils, which raised an eyebrow. Shocker, they tasted like raw red lentils (spices and sauce notwithstanding). The recipe also called for baking soda, so they exploded a little in the tomato sauce due to the acidity. 2/10 looking for a different recipe.
I wouldn't say it's my worst, though. One time I tried to hard boil an egg in the microwave. With the shell still on.
What's a culinary project that didn't go your way?
This is something I probably should have put in the OP, but I was candying oranges recently and forgot to turn the burner off. Dislodging the resulting carbonized orange disc from the pan was a process.