Clean shrimp and pat dry with a paper towel.
Season both sides of the shrimp with the House Seasoning Blend.
Add butter and olive oil to a large skillet over medium high heat.
When butter is melted, add the shrimp in a single layer. Be careful not to overcrowd the pan. Cook the shrimp in batches if you need to.
Cook the shrimp for 4 minutes, stirring periodically.
Remove shrimp from the pan and add the diced onion.
Cook the onion until softened, about 5 minutes.
Reduce heat to medium and add both sauces to the pan and stir to combine.
Add spinach to the pan and cover. Simmer for 5 minutes or until the spinach wilts.
Add shrimp and any juices accumulated on the plate back into the sauce and simmer for 5 additional minutes.
Serve shrimp over prepared pasta.
Top with grated parmesan cheese if desired.