Cook pasta according to package directions, minus 1 minute. Drain. But reserve ½ cup pasta water.
In pasta pot, over medium-low heat, add olive oil, garlic, and asparagus, cook stirring 3 minutes. This will sizzle when you add the ingredients. Add pasta back to pot, stir in cheese and 1/3 cup pasta water. I start with 1/3 cup and add more water if I need it, to make a creamy sauce.
Sprinkle chopped walnuts. Squeeze a lemon wedge over, about 1 teaspoon juice.
Blue cheese can be replaced with goat cheese. Pine nuts can be substituted for walnuts.