1) Preheat oven to 400f.
2) Trim the tough ends of your asparagus. Then place on a baking sheet with 2 tbsp olive oil, salt and pepper. Mix until evenly coated.
3) Roast for 15-20 minutes, shaking pan to turn asparagus halfway through cooking.
4) In a frying pan on medium low, heat 1 tbsp olive oil. Add flour cook for 1 minute. Then add milk and cook until thickened.
5) Whisk in Dijon, lemon juice, salt and pepper until combined.
Then place asparagus on a plate with the cream sauce and enjoy!