Combine butter, curry powder, lemon juice and salt in a small bowl.
Heat oil in a large nonstick skillet over medium heat. Add shallot and cook, stirring, until softened, about 2 minutes. Add asparagus and cook, stirring, until just tender, 3 to 5 minutes. Stir the curry butter into the asparagus; toss to coat.
Tip: Check the ingredient label on your brand of curry powder: if it has added salt (as some do), you may omit the salt in the recipe or salt to taste.
1 vegetable, 1 fat