Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
In a small bowl, mince the garlic and finely chop the fresh rosemary and thyme.
Whisk together half of the olive oil, minced garlic, rosemary, thyme, sea salt, and black pepper to create a herb paste.
Pat the beef tenderloin dry with a paper towel and rub the herb paste evenly over all sides of the meat.
Place the beef on the prepared baking sheet and roast for 15 to 20 minutes, or until it reaches your preferred level of doneness.
While the beef roasts, toss the trimmed asparagus spears with the remaining olive oil and a pinch of salt.
Add the asparagus to the baking sheet during the final 10 minutes of roasting.
Remove from the oven and let the beef rest for at least 5 minutes before slicing against the grain.
Finish the asparagus with a squeeze of fresh lemon juice and serve immediately.