Place shrimp, salt, pepper, ½ tsp. oregano, ½ tsp. dill, red pepper flakes, minced garlic, and splash of olive oil in a large resealable bag.
In another large bag, add the purple onion, tomatoes, lemon juice, olives, 1 tsp. oregano, and 1 tsp. dill.
Staple the bags together above the seam.
Remove excess air, seal, and freeze.
Thaw overnight in the fridge.
Dump the contents from the large bag into a saucepan and bring them to a boil.
Reduce heat and simmer for 15 minutes.
Add the shrimp.Cook 5-7 minutes more.Top with feta and fresh herbs.