In a small saucepan, melt butter and sauté onion until translucent.

Add basil and mix until the cubes are melted.

Add garlic and parsley and sauté an additional two minutes, until fragrant.

Mix in flour and spices. Slowly add heavy cream and bring the mixture to a simmer.

Allow to simmer until the sauce thickens.

Pour sauce over cooked ravioli. Mix well and serve immediately.