Separately sear andouille sausage and shrimp and remove. Saute garlic with serrano and chipotle chiles in the sausage grease. Add spinach (thawed and drained), chicken stock, black pepper, cumin, and Mexican oregano and cook down. Stir in a dollop of yogurt and then finish by adding in the andouille, shrimp, and feta cheese. Turned out very well, spicy and flavorful.