Slice your carrots into rounds, then use a small paring knife to notch a tiny stem at the top and cut two small triangles on the sides to form a pumpkin shape. For the mushrooms, slice them in half and score a few lines into the stem, then press a straw into the cap to create eye holes for a skull look.
Heat the olive oil in a large pot over medium-high heat, then add your diced celery, onion, and carved carrot pumpkins. Let these cook for about 5 minutes, stirring occasionally, until the onion turns soft and translucent.
Add the ground turkey to the pot along with a pinch of salt. Use your spoon to break it into small crumbles as it cooks, and sauté for 4 to 5 minutes until most of the pink is gone. Drain off any excess liquid before moving on.
Stir in the minced garlic, marjoram, parsley, dill, quartered baby potatoes, tomato paste, and Worcestershire sauce. Mix everything together so the tomato paste coats the vegetables evenly and the herbs start releasing their aroma.
Pour in the beef broth and bring the pot to a boil over high heat. Once it's bubbling, cover the pot, reduce the heat, and let everything simmer for about 10 minutes so the potatoes have time to soften.
Drop in your carved mushroom skulls, cover the pot again, and cook for another 5 minutes. Give the stew a taste and adjust the salt or herbs if needed, then it's ready to ladle into bowls and serve.