When cooking asparagus in the oven at 350°F (175°C), the cooking time will depend on the thickness of the asparagus spears. Thicker asparagus will require more time to cook, while thinner ones will cook faster. Here's a general guideline for cooking asparagus in the oven at 350°F:
Preheat the oven to 350°F (175°C).
Trim the tough ends of the asparagus spears.
If desired, you can toss the asparagus in a little olive oil, salt, and pepper for added flavor.
Arrange the asparagus in a single layer on a baking sheet.
Cook the asparagus for approximately 12 to 15 minutes for medium-thickness spears. For thicker spears, it might take around 15 to 20 minutes, and for thinner ones, it could be around 10 to 12 minutes.
To check for doneness, pierce a spear with a fork. It should be tender but still have a slight crispness to it. Be careful not to overcook, as it can make the asparagus mushy.
Keep in mind that these cooking times are approximate, so it's a good idea to check the asparagus periodically during cooking to achieve the desired level of doneness. If you prefer your asparagus to be softer, you can cook it for a little longer, but be cautious not to let it become too soft and lose its texture. Enjoy your delicious oven-roasted asparagus!