To a bowl, add the shrimp, olive oil, paprika, salt, black pepper, onion powder, red pepper flakes, dried basil, and oregano. Mix together to marinade evenly.
In a saucepan, add a drizzle of olive oil over medium heat. Add the garlic and tomato paste and cook for about 4 to 5 minutes.
Add the shrimp to the pan and cook for 6 to 8 minutes until the shrimp is fully cooked through and seared.
Take off the heat and add the parsley. Mix one last time.
Preheat the oven to broil.
Cut the loaf in half across so you have two open-faced halves. Use only one half if you want it loaded with shrimp. Place on a baking tray lined with parchment paper.
Add the shrimp filling on top of the butter and then cover with shredded mozzarella and parmesan.
Transfer to the oven and broil for a few minutes, about 3 to 6 minutes. Watch very closely as it can quickly burn under broil very fast.
Once the top turns golden brown and the cheese is bubbly, take it out of the oven.
Slice across into individual pieces and serve warm!