Make spice blend: Combine all spices and divide into two equal portions.
Season shrimp: Toss shrimp with olive oil, salt, pepper, and one portion of spice blend.
Sear shrimp: Cook in a hot oiled pan over medium-high heat 1-2 minutes per side until pink and slightly charred. Remove and set aside.
Build sauce: In the same pan melt butter. Cook minced garlic until fragrant. Add chicken broth and scrape up any bits. Add heavy cream and remaining spice blend. Simmer 3-4 minutes until slightly thickened.
Add parmesan: Stir in grated parmesan until fully melted.
Finish: Add shrimp back to pan and toss to coat. Heat through 1 minute. Taste and adjust seasoning.
Serve: Top with fresh parsley. Serve over rice or in a banh mi baguette.