Heat the oil in a large saute pan with the onion and garlic and cook for about 2 minutes
Crumble and add the sausage and continue heating until cooked
Add flour and stir to combine forming a roux
Stir in chicken broth slowly in small portions, waiting until sauce has thickened before adding more
Add bay leaves and shrimp and cook for about 3 minutes or until shrimp turn pink
Add salt and pepper to taste, and lemon juice.
Stir in parsley and green onions
Serve over grits