c("Melt butter in a heavy large saucepan over medium-high heat.  Add garlic and saute 30 seconds.", "Add onion and saute another 2 minutes or so.", "Then add mushrooms and saute until tender, about 10 minutes.", "Don't worry if the mixture seems too dry.", "Reduce heat to medium, then add flour and stir another minute.  Add white wine and cook until mixture thickens, stirring frequently--about another 2-3 minutes.", "Mix in sour cream, and season to taste with salt and pepper.", "Add cooked linguine and toss to blend linguine with sauce.", 
"**Adapted from a recipe in _Bon Appetit_.")