Cajun Shrimp Pasta

Name: Cajun Shrimp Pasta
Ingredients: 4 tbsp Cajun seasoning (store bought or homemade (see below)); 3 tsp paprika; 1 tsp salt; 2 tsp garlic powder; 1 tsp black pepper; 1 tsp onion powder; 1 tsp dried oregano; 1 tsp cayenne pepper; 1 tsp dried thyme; 1 lb penne pasta (or pasta of choice); 1 lb shrimp (fresh or frozen, peeled and deveined); 1 tbsp olive oil; 2 tbsp cajun seasoning (divided); 3 tbsp unsalted butter (or salted butter); 3 cloves garlic (minced); 14 ounce can diced tomatoes (or canned crushed tomatoes ); 1 1/2 cups heavy whipping cream; 1/2 cup parmesan cheese (grated); Parmesan cheese (grated); 2 Tbsp parsley to garnish (chopped)